fix: use zip instead of tar for the tracer flare [backport 2.10]

[github-actions]

Backport 26682f8 from #10019 to 2.10.

System tests require the flare to be a zip, not a tar file.

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-10019-to-2.10
Commit report: 8cb056d
Test service: dd-trace-py

✅ 0 Failed, 147825 Passed, 25470 Skipped, 6h 9m 12.09s Total duration (3h 17m 4.66s time saved)
⌛ 1 Performance Regression

⌛ Performance Regressions vs Default Branch (1)

• test_schematized_service_names[v1] - test_djangorestframework.py 7.13s (+5.84s, +452%) - Details

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 10.20%. Comparing base (4d99cf0) to head (8cb056d).
Report is 22 commits behind head on 2.10.

Files with missing lines	Patch %	Lines
ddtrace/internal/flare/flare.py	25.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             2.10   #10078       +/-   ##
===========================================
- Coverage   74.24%   10.20%   -64.05%     
===========================================
  Files        1332     1313       -19     
  Lines      126730   125190     -1540     
===========================================
- Hits        94096    12777    -81319     
- Misses      32634   112413    +79779     

Flag	Coverage Δ
	10.20% <25.00%> (?)

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[pr-commenter]

Benchmarks

Benchmark execution time: 2024-09-30 19:56:49

Comparing candidate commit 8cb056d in PR branch backport-10019-to-2.10 with baseline commit 6b38e75 in branch 2.10.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 207 metrics, 9 unstable metrics.