Update genTestFolderList to dynamically detect test directories

[Agaba-derrick]

Summary

This PR updates genTestFolderList to dynamically discover JCK test directories instead of relying on hard-coded version-specific paths. This ensures new test targets are automatically detected as the JCK layout evolves.

What Changed

• Removed version-based directory assumptions (e.g., *-runtime-$ver)
• Added dynamic directory scanning for:
  • runtime
  • compiler
  • devtools
• Improved resilience to future JCK repository structure changes

Why

As test materials evolve over time, the previous static approach could miss new test folders. This update keeps target detection accurate and future-proof.

Issue

Closes #6761

[Agaba-derrick]

@llxia @smlambert kindly asking for a review

[smlambert]

hi @Agaba-derrick - this is not the change I expected for this one. I was hoping for the most minimal change to this file, essentially changing this block
to

	if [ "$VERSION" -eq 8 ] ; then 
		ver="$VERSION"c
	elif [ "$VERSION" -eq 11 ] ; then 
		ver="$VERSION"a
	else 
		ver="$VERSION"
	fi 

[Agaba-derrick]

hi @Agaba-derrick - this is not the change I expected for this one. I was hoping for the most minimal change to this file, essentially changing this block to

	if [ "$VERSION" -eq 8 ] ; then 
		ver="$VERSION"c
	elif [ "$VERSION" -eq 11 ] ; then 
		ver="$VERSION"a
	else 
		ver="$VERSION"
	fi 

thanks @smlambert i will change this Asap !

[smlambert]

@Agaba-derrick - see these lines, you will need to deal with both 11 and 17 (my example only did 11)

[sophia-guo]

A minor note: there is a unintended extra indentation, we can keep as before.

[sophia-guo]

There is no devtools for 11 and 17. So we can keep this as before.

[smlambert]

@Agaba-derrick - please address @sophia-guo 's recent review comments after which we will be good to merge

[Agaba-derrick]

@smlambert le me work on these Asap