Remove other pandas.core.index files from MyPy Blacklist

[makbigc]

• xref Typing Cleanup - Remove Blacklisted Items #25882
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[codecov]

Codecov Report

Merging #26315 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26315      +/-   ##
==========================================
- Coverage   92.04%   92.03%   -0.01%     
==========================================
  Files         175      175              
  Lines       52291    52291              
==========================================
- Hits        48132    48128       -4     
- Misses       4159     4163       +4

Flag	Coverage Δ
#multiple	90.59% <100%> (ø)	⬆️
#single	40.74% <62.5%> (-0.15%)	⬇️

Impacted Files	Coverage Δ
pandas/core/indexes/base.py	96.72% <100%> (ø)	⬆️
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.01% <0%> (-0.12%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 23b6115...290e275. Read the comment docs.

[codecov]

Codecov Report

Merging #26315 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26315      +/-   ##
==========================================
- Coverage   92.04%   92.03%   -0.01%     
==========================================
  Files         175      175              
  Lines       52291    52291              
==========================================
- Hits        48132    48128       -4     
- Misses       4159     4163       +4

Flag	Coverage Δ
#multiple	90.59% <100%> (ø)	⬆️
#single	40.74% <62.5%> (-0.15%)	⬇️

Impacted Files	Coverage Δ
pandas/core/indexes/base.py	96.72% <100%> (ø)	⬆️
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.01% <0%> (-0.12%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 23b6115...290e275. Read the comment docs.

[WillAyd]

Can you convert these to absolute references rather than pulling from the top level?

[jreback]

this is ok, we do this all over the place

[jreback]

can you merge master