Allow to override final JAR filename using project property

[ghost]

Description

Allow user to specify project property when executing gradle command to override final JAR filename. Behavior is unchanged if property is not set.

For example, running .\gradlew --no-daemon --build-cache -PjarFilename=server jar will produce server.jar as output.

This PR does not attempt to propose any actual usage for this enhancement., however it can be useful in environments where source is built into JAR file and then copied/used/packaged by other tools, which would have otherwise no way of knowing what the final resulting filename was due to Gradle appending version to it.

The only reason this PR is necessary is because Gradle can not override native archiveName from outside of configuration, requiring this ugly workaround.

Issues fixed by this PR

N/A

Type of changes

• Bug fix
• New feature
• Enhancement
• Documentation

Checklist:

• My code follows the style guidelines of this project
• My pull request is unique and no other pull requests have been opened for these changes
• I have read the Contributing note and Code of conduct
• I am responsible for any copyright issues with my code if it occurs in the future.