Consolidate ValuePropogation paths for with and without off-heap

[rmnattas]

While adding support for the off-heap feature, a separate path was added in value propagation to handle array transformations for off-heap.
This can be consolidated by using the added array transformation APIs but the array-lets runs reach the same path unexpectedly and causes the JVM to crash. Hence the addition of a separate path for offheap while keeping non-offheap code the same.

Consolidating opportunities:

• generateArrayTranslateNode
• generateLenForArrayCopy
• generateArrayAddressTree

Reference: #7296 (comment)

Original commit that concolidate the paths: rmnattas@ed01b6d
Updated commit using separate paths: rmnattas@29e0c01