Fixed using Deprecated Maven Methods which are Marked for Removal

[vaisakhkannan]

Fixes #823 Updated getMavenHome() method to getMavenHomeType() method and Updated resolveMavenHomeDirectory() method to getMavenHomeFile() method

[vaisakhkannan]

@aparnamichael , When I compared the implementation of the old deprecated method (resolveMavenHomeDirectory), I noticed it uses a staticOrBundled method. What this method actually does is..

1. It attempts to cast the current object (this) to StaticResolvedMavenHomeType.
2. If the cast is successful, it returns the casted object.
3. If the cast fails (i.e., this is not an instance of StaticResolvedMavenHomeType), it returns 'BundledMaven3'.

Using the same approach, I modified the code to return the default 'BundledMaven3.INSTANCE'

If we use null as the default return value, we will get an IllegalArgumentException if the casting fails in the future, as shown in the image. I encountered this issue during testing because I commented out the relevant code below.

https://github.com/OpenLiberty/liberty-tools-intellij/blob/54d1e896f432156a058642183e48b222a86b44c9/src/main/java/io/openliberty/tools/intellij/util/LibertyMavenUtil.java#L208C9-L211C10

I believe this solution is better now. Please review my changes.

[mrglavas]

I believe this solution is better now. Please review my changes.

Thanks for digging deeper to align the behaviour of the new API usage with the old one.