Update 3.0.0 manifest to use JDK-21

[reta]

Description

Update 3.0.0 manifest to use JDK-21

Issues Resolved

Part of #4071

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[codecov]

Codecov Report

Merging #4182 (4cc94a2) into main (44a68e4) will decrease coverage by 0.03%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4182      +/-   ##
==========================================
- Coverage   93.31%   93.29%   -0.03%     
==========================================
  Files         187      187              
  Lines        5792     5802      +10     
==========================================
+ Hits         5405     5413       +8     
- Misses        387      389       +2     

see 1 file with indirect coverage changes

[rishabh6788]

@reta I can see TestReleaseNotesCheck failing as it is now expecting jdk-21 instead of jdk-20.
In your workspace can you please run below and check-in the updated files.

./gradlew clean
./gradlew test -info -Ppipeline.stack.write=true --tests=TestReleaseNotesCheck

[reta]

@reta I can see TestReleaseNotesCheck failing as it is now expecting jdk-21 instead of jdk-20.

Thanks a lot for the hint, @rishabh6788 !

[rishabh6788]

I believe @peterzhuamazon is taking care of deploying new jenkins agent AMIs with jdk-21.
He will be approving and merging this once everything is in place.