Add ci for jdk21 runtime

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (0bb15c4) 84.42% compared to head (b3a4dff) 84.43%. Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1265 +/- ## ============================================ + Coverage 84.42% 84.43% +0.01% - Complexity 2898 2900 +2 ============================================ Files 325 325 Lines 9414 9414 Branches 1121 1121 ============================================ + Hits 7948 7949 +1 Misses 961 961 + Partials 505 504 -1 ```

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