test: add stable Vec benchmarks

[maksymar]

This PR adds benchmarks for stable Vec to compare with other storage options.

It also introduces BoundedVec for use with stable Vec, which only supports bounded types. Now both bounded and unbounded vector types are available. Blob is not used for large data (e.g., 100 MB) due to canister heap limitations.

[github-actions]

canbench 🏋 (dir: ./benchmarks/memory_manager) 1e3dd6a 2025-05-27 16:39:45 UTC

✅ ./benchmarks/memory_manager/canbench_results.yml is up to date
📦 canbench_results_memory-manager.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./benchmarks/vec) 1e3dd6a 2025-05-27 16:39:45 UTC

✅ ./benchmarks/vec/canbench_results.yml is up to date
📦 canbench_results_vec.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 16 | new 0 | improved 0 | regressed 0 | unchanged 16]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./benchmarks/compare) 1e3dd6a 2025-05-27 16:40:37 UTC

✅ ./benchmarks/compare/canbench_results.yml is up to date
📦 canbench_results_compare.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 18 | new 6 | improved 0 | regressed 0 | unchanged 12]
    change:   [max 0 | p75 0 | median -517.50K | p25 -3.90M | min -95.26M]
    change %: [max 0.00% | p75 0.00% | median -0.04% | p25 -0.08% | min -0.11%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 18 | new 6 | improved 0 | regressed 0 | unchanged 12]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 18 | new 6 | improved 0 | regressed 0 | unchanged 12]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------

Only significant changes:
| status | name                | calls |   ins |  ins Δ% |    HI |  HI Δ% |   SMI |  SMI Δ% |
|--------|---------------------|-------|-------|---------|-------|--------|-------|---------|
|  new   | read_chunks_vec_1   |       | 1.36B |         | 3.20K |        | 1.67K |         |
|  new   | read_chunks_vec_1k  |       | 1.38B |         | 3.20K |        | 1.67K |         |
|  new   | read_chunks_vec_1m  |       | 4.75B |         | 3.78K |        | 1.67K |         |
|  new   | write_chunks_vec_1  |       | 1.26B |         | 3.20K |        | 1.67K |         |
|  new   | write_chunks_vec_1k |       | 1.27B |         | 3.20K |        | 1.67K |         |
|  new   | write_chunks_vec_1m |       | 3.74B |         | 3.78K |        | 1.67K |         |

ins = instructions, HI = heap_increase, SMI = stable_memory_increase, Δ% = percent change

---------------------------------------------------
CSV results saved to canbench_results.csv

[github-actions]

canbench 🏋 (dir: ./benchmarks/btreemap) 1e3dd6a 2025-05-27 16:41:31 UTC

✅ ./benchmarks/btreemap/canbench_results.yml is up to date
📦 canbench_results_btreemap.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 285 | new 0 | improved 0 | regressed 0 | unchanged 285]
    change:   [max 0 | p75 0 | median 0 | p25 0 | min 0]
    change %: [max 0.00% | p75 0.00% | median 0.00% | p25 0.00% | min 0.00%]

---------------------------------------------------
CSV results saved to canbench_results.csv