Add Java 28 Constants

[SougandhS]

Fixes : #982

What it does

How to test

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)

[mpalat]

@SougandhS can you please check whether the JenkinsFile has been changed to have 28? In the run, I see this line -Ptest-on-javase-26 .

[SougandhS]

@SougandhS can you please check whether the JenkinsFile has been changed to have 28? In the run, I see this line -Ptest-on-javase-26 .

Jenkinsfile changes are not required for adding the constants. This requires a build, and since we don't have a Java 28 build yet, I'm merging this for now. Once master is open for 4.42 development, I'll include the same change in master.

[mpalat]

Jenkinsfile changes are not required for adding the constants. This requires a build, and since we don't have a Java 28 build yet, I'm merging this for now. Once master is open for 4.42 development, I'll include the same change in master.

Sure @SougandhS . Until the post RC2 merge, if someone wants to use the launcher for testing, let it be done via spawned (child) eclipse.