[2.19] Bump reactor and reactor-netty dependencies to match main

[dbwiddis]

Description

Bumps reactor and reactor-netty dependencies to match main.

Related Issues

Fixes CVE-2025-22227

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[github-actions]

❌ Gradle check result for ae80fe1: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 5db30eb: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❕ Gradle check result for 5db30eb: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.90%. Comparing base (50914fd) to head (ba85939).
⚠️ Report is 1 commits behind head on 2.19.

Additional details and impacted files

@@             Coverage Diff              @@
##               2.19   #19603      +/-   ##
============================================
+ Coverage     71.85%   71.90%   +0.05%     
- Complexity    65896    65972      +76     
============================================
  Files          5341     5341              
  Lines        307273   307273              
  Branches      44845    44845              
============================================
+ Hits         220786   220943     +157     
+ Misses        68003    67910      -93     
+ Partials      18484    18420      -64     

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[github-actions]

✅ Gradle check result for ba85939: SUCCESS