[fix][fn] enable Go function token auth and TLS

[flowchartsman]

Fixes #20451

Motivation

Go functions die when auth is turned on. I would like them to not die.

Modifications

Added transport of auth plugin and auth plugin params to go instance config.
Added parsing of these values into the pf sdk

Verifying this change

• Make sure that the change passes the CI checks.
• Cannot integration test functions with auth

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

No doc change needed, because the docs don't mention the exception, so now the intuitive assumption holds.

Matching PR in forked repository

PR in forked repository: flowchartsman#6

[flowchartsman]

NOTE Unless I missed something there are no unit integration tests for functions that enable auth. The closest I could find was the tests in tests/integration/src/test/java/org/apache/pulsar/tests/integration/functions/PulsarFunctionsTest.java, however it makes no mention of auth. I'm not familiar enough with the testing framework of the product to know if there's a way to easily run one of these tests with auth enabled, so if we want those tests, I'm going to need some assistance.

[michaeljmarshall]

LGTM. The one detail I see that might be missing for the go function runtime is an ability to configure TLS. Token based auth is recommended to be performed over TLS.

That feature would go in another PR. At the very least, we'll want to document this limitation to make sure users are aware of the current state of go functions.

[flowchartsman]

Converting this to draft to integrate TLS (see #20453 / PIP-273) Ready for review

[flowchartsman]

That feature would go in another PR.
Hold my 🍺

[michaeljmarshall]

Great work @flowchartsman! I left one comment, but it's very minor.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.91%. Comparing base (5e6e6ce) to head (9537ccb).
⚠️ Report is 2214 commits behind head on master.

Files with missing lines	Patch %	Lines
.../apache/pulsar/functions/runtime/RuntimeUtils.java	76.92%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #20468      +/-   ##
============================================
- Coverage     72.95%   72.91%   -0.05%     
+ Complexity    31914    31907       -7     
============================================
  Files          1867     1867              
  Lines        138485   138540      +55     
  Branches      15202    15208       +6     
============================================
- Hits         101037   101014      -23     
- Misses        29438    29509      +71     
- Partials       8010     8017       +7     

Flag	Coverage Δ
inttests	24.14% <0.00%> (+0.02%)	⬆️
systests	24.98% <33.33%> (-0.06%)	⬇️
unittests	72.20% <83.33%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...pulsar/functions/instance/go/GoInstanceConfig.java	100.00% <100.00%> (ø)
.../apache/pulsar/functions/runtime/RuntimeUtils.java	78.26% <76.92%> (-0.17%)	⬇️

... and 66 files with indirect coverage changes

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[tisonkun]

Merging...

Thanks for your contribution @flowchartsman!