fix(flare): handle non-dict AGENT_CONFIG products from RC [backport 2.10]

[github-actions[bot]]

Backport a482830bdec4414a29eaf292ca46f9d3c6fc2a5f from #10985 to 2.10.

Tracer flares were failing due to AGENT_CONFIG items possibly containing pure booleans, and not just dictionaries. Example:

AGENT_CONFIG=[True, {...config...}, ...]

This would break the flare because it would be expecting only dicts.

Checklist

• [x] PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• [x] Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[datadog-dd-trace-py-rkomorn[bot]]

Datadog Report

Branch report: backport-10985-to-2.10 Commit report: 84f5d41 Test service: dd-trace-py

:white_check_mark: 0 Failed, 173294 Passed, 1968 Skipped, 9h 57m 37.23s Total duration (1h 19m 23.48s time saved)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.50000% with 14 lines in your changes missing coverage. Please review.

Project coverage is 10.20%. Comparing base (4d99cf0) to head (84f5d41). Report is 24 commits behind head on 2.10.

Files with missing lines	Patch %	Lines
ddtrace/internal/flare/handler.py	9.09%	10 Missing :warning:
ddtrace/internal/flare/_subscribers.py	25.00%	3 Missing :warning:
tests/internal/test_tracer_flare.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##             2.10   #11062       +/-   ##
===========================================
- Coverage   74.24%   10.20%   -64.05%     
===========================================
  Files        1332     1313       -19     
  Lines      126730   125201     -1529     
===========================================
- Hits        94096    12781    -81315     
- Misses      32634   112420    +79786     

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[erikayasuda]

Blocked until this merges: https://github.com/DataDog/dd-trace-py/pull/11070

[pr-commenter[bot]]

Benchmarks

Benchmark execution time: 2024-10-18 04:36:02

Comparing candidate commit 5182f54ce7a1d4cd9586a75e2ee5bd6527db72b8 in PR branch backport-10985-to-2.10 with baseline commit 93c2c4138d7c3603cc8badaeb9ac36a14e2db054 in branch 2.10.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 221 metrics, 9 unstable metrics.