[Tests][LV][AArch64] Pre-commit tests for changing loop interleaving count...

[Tests][LV][AArch64] Pre-commit tests for changing loop interleaving count computation for loops that need to run scalar iterations (#79640)

This patch contains a set of pre-commit tests for changing the loop interleaving count computation in a subsequent patch in order to address loops that need to execute at least a single scalar iteration in the epilogue.