fix(configurations): correctly parse payload_tagging_services [backport 2.21]

[github-actions]

Backport 6e58426 from #12180 to 2.21.

Previously this:

        "payload_tagging_services": set(
            os.getenv("DD_TRACE_CLOUD_PAYLOAD_TAGGING_SERVICES", default={"s3", "sns", "sqs", "kinesis", "eventbridge"})
        ),

would require users to do config.botocore["payload_tagging_services"].add("SERVICE_HERE") as os.getenv just returns string.

If someone were to do:

$env:DD_TRACE_CLOUD_PAYLOAD_TAGGING_SERVICES = "foo,bar"

it would be converted into the set of {'o', 'b', 'r', 'f', ',', 'a'}

This correctly parses it as a set of {"foo", "bar"} while also stripping any potential whitespace.

Checklist

• 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

• 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]

Datadog Report

Branch report: backport-12180-to-2.21
Commit report: a01305f
Test service: dd-trace-py

✅ 0 Failed, 130 Passed, 1378 Skipped, 1m 45.85s Total Time

[github-actions]

CODEOWNERS have been resolved as:

releasenotes/notes/correctly-parse-payload_tagging_services-794cdf0f340975e6.yaml  @DataDog/apm-python
tests/snapshots/tests.contrib.botocore.test.BotocoreTest.test_dynamodb_payload_tagging.json  @DataDog/apm-python
ddtrace/contrib/internal/botocore/patch.py                              @DataDog/apm-core-python @DataDog/apm-idm-python
tests/contrib/botocore/test.py                                          @DataDog/apm-core-python @DataDog/apm-idm-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-20 19:36:00

Comparing candidate commit a01305f in PR branch backport-12180-to-2.21 with baseline commit 6a4347f in branch 2.21.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 396 metrics, 2 unstable metrics.