test: allow zero min in eventloopdelay histogram

[trivikr]

The test-performance-eventloopdelay test can fail intermittently after
recording samples if one event loop delay sample is 0.

HDR histograms allow 0 values, and hdr_min() returns 0 when bucket 0 has
a count. This can happen when two successive uv_hrtime() reads observe the
same effective clock value.

This updates the test to keep requiring recorded samples while allowing
histogram.min to be 0.

Refs: https://github.com/nodejs/reliability/blob/main/reports/2026-05-17.md#jstest-failure

---

Assisted-by: openai:gpt-5.5

[lpinca]

Duplicate of #63100.

[trivikr]

Added request-ci label for #63100, so that it can be merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.05%. Comparing base (a9b0a83) to head (8675445).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #63387      +/-   ##
==========================================
- Coverage   90.06%   90.05%   -0.02%     
==========================================
  Files         714      714              
  Lines      225629   225648      +19     
  Branches    42702    42698       -4     
==========================================
- Hits       203211   203202       -9     
+ Misses      14232    14224       -8     
- Partials     8186     8222      +36     

see 64 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.