[llvm] [LV] Change loops' interleave count computation (PR #73766)

[Nilanjana Basu via llvm-commits]

nilanjana87 wrote:

Added new set of pre-commit tests in https://github.com/llvm/llvm-project/pull/74689 for the changed algorithm for computing loop interleaving count.

https://github.com/llvm/llvm-project/pull/73766