[DOM] NaiveASTFlattener should be sync with ASTFlattener of the JDT.UI

[subyssurendran666]

What it does

The unnamed variables and pattern's DOM and ASTRewrite implemented through #2623. Following items should be added along with that.

• The Javadoc of both APIs i.e. TypePattern.getPatternVariable() and TypePattern.getPatternVariable2() is same and not clear regarding the difference.
• The methods in JDT UI's ASTFlattener are kept in sync with NaiveASTFlattener(TypePattern). Hence, the change should be done in NaiveASTFlattener as well and then synced to ASTFlattener.

The Problem has reported here: eclipse-jdt/eclipse.jdt.ui#1764 (comment)

How to test

This PR closes #3261

Author checklist

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

[subyssurendran666]

@mpalat could you please review this PR and share your insights on this ?

[mpalat]

@mpalat could you please review this PR and share your insights on this ?

Will take a look. Meanwhile, please have a look and follow the process at https://github.com/eclipse-platform/eclipse.platform/blob/master/docs/Eclipse_API_Central_Deprecation_Policy.md when you are looking at deprecating APIs

[mpalat]

Suby,
Let us do some additional cleanup here - Refer to MethodDeclaration - modifiers and see how it got changed. Let us do a similar approach here.

[mpalat]

+1
Please rebase and submit. Thanks

[laeubi]

@mpalat @subyssurendran666

There is an javadoc error that fails the build now:

Error:  Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.11.2:javadoc (attach-javadocs) on project org.eclipse.jdt.doc.isv: An error has occurred in Javadoc report generation: 
Error:  Exit code: 1
Error:  /home/runner/work/tycho/tycho/aggregator/eclipse.platform.common/bundles/org.eclipse.jdt.doc.isv/../../../eclipse.jdt.core/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TypePattern.java:190: error: unknown tag: Deprecated
Error:  	 * @Deprecated(forRemoval = true, since="2024-07")
Error:  	   ^

eclipse.jdt.core/org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TypePattern.java

Line 190 in 5c82c91

* @Deprecated(forRemoval = true, since="2024-07")

I assume this should be a method annotation and not part of the javadoc.

Also the date seems wrong @Deprecated(forRemoval = true, since="2025-03") is probably wanted?