Replace Bundler.with_clean_env with Bundler.with_unbundled_env

[TonyCTHsu]

What does this PR do?

Clear deprecation warnings:

[DEPRECATED] `Bundler.with_clean_env` has been deprecated in favor of `Bundler.with_unbundled_env`. If you instead want the environment before bundler was originally loaded, use `Bundler.with_original_env` (called at /app/spec/datadog/core/environment/execution_spec.rb:190)

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-11-12 15:29:24

Comparing candidate commit 65847a8 in PR branch tonycthsu/remove-with_clean_env with baseline commit 18960b5 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 29 metrics, 2 unstable metrics.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.73%. Comparing base (54a779e) to head (1ff92fb).
Report is 12 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4104      +/-   ##
==========================================
- Coverage   97.74%   97.73%   -0.01%     
==========================================
  Files        1341     1341              
  Lines       80356    80356              
  Branches     4030     4030              
==========================================
- Hits        78541    78535       -6     
- Misses       1815     1821       +6     

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[sarahchen6]

looks good!