feat(iast): report telemetry log error [backport 2.14]

[github-actions]

Backport e237d91 from #10740 to 2.14.

Always report a telemetry log error when an IAST propagation error raises, regardless of whether the _DD_IAST_DEBUG environment variable is enabled or not.

• Fix some side effects of aspect functions in join_aspect, ljust_aspect
• Fix format_aspect "if not..." side-effect
• Fix format_map_aspect not BuiltinFunctionType
• Fix _aspect_split error task APPSEC-54782
• Early fail in decode/encode_aspect

Jira Task: APPSEC-54993

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

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-09-24 17:41:38

Comparing candidate commit aa80e16 in PR branch backport-10740-to-2.14 with baseline commit d4a7535 in branch 2.14.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 356 metrics, 48 unstable metrics.