test: remove unnecessary process.exit calls from test files

[aduh95]

We have a bunch of calls that do nothing, this PR removes those to make the tests more readable

[nodejs-github-bot]

Review requested:

• @nodejs/performance
• @nodejs/security-wg
• @nodejs/test_runner

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71476/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.65%. Comparing base (2ae6d8f) to head (36f0203).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62020      +/-   ##
==========================================
- Coverage   89.74%   89.65%   -0.09%     
==========================================
  Files         676      676              
  Lines      206072   206231     +159     
  Branches    39507    39504       -3     
==========================================
- Hits       184936   184900      -36     
- Misses      13303    13461     +158     
- Partials     7833     7870      +37     

see 46 files with indirect coverage changes

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71479/

[mcollina]

CI does not look happy

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71495/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71497/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/71501/