Block `elasticjob-test-native` module from compiling on JDK 8 to JDK16

[linghengqian]

Fixes #2420 .

Changes proposed in this pull request:

• Block elasticjob-test-native module from compiling on JDK 8 to JDK16.
• Also fixes #2423 . I prefer the current PR handling, which even allows to compile with JDK 8 and execute unit tests of elasticjob-test-native under Spring Boot 3.3.2 in IntelliJ IDEA out of the box.
• 

[codecov-commenter]

Codecov Report

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

Project coverage is 79.61%. Comparing base (a8ba448) to head (a21b276). Report is 41 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2427 +/- ## ============================================ - Coverage 80.10% 79.61% -0.50% + Complexity 1113 1106 -7 ============================================ Files 204 204 Lines 3821 3806 -15 Branches 445 443 -2 ============================================ - Hits 3061 3030 -31 - Misses 570 585 +15 - Partials 190 191 +1 ```

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