Don't overwrite local settings when java_language_level is not set in bazelproject file

[ThomasCJY]

Description of the bug:

Background
Bazel Plugin always overwrites the local java language version settings and kotlin jvm target level version based on the java_language_level defined in the bazelproject file. However, when java_language_level doesn't get specified in bazelproject file, bazel project sync will use the default 1.8 java version instead.

This is problematic because developers lose the ability to customize the java language and jvm target levels inside their IDE.

Expected behavior
Do not overwrite the current java language level and kotlin jvm target level when java_language_level is not defined inside bazelproject file

Which category does this issue belong to?

Intellij

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

1. Create a kotlin based bazel project
2. Do not define java_language_level in bazelproject file
3. After first project sync, you can see the java language level and kotlin jvm target level has been set to 8 and 1.8
4. Manually update those values in IDE settings to 11, save changes
5. Do another bazel sync, notice that the values will be overwritten back to 1.8 again.

Which Intellij IDE are you using? Please provide the specific version.

No response

What programming languages and tools are you using? Please provide specific versions.

No response

What Bazel plugin version are you using?

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response