This reverts commit b44e6e01f7f778bbb569e07821f5ddfdb90c4d4d.

These two extensions have identical functionality so we always want to
treat them the same.

If the original instruction is going to be scheduled after same
instruction being scheduled as copyable, need to recalculate
dependencies. Otherwise, the dependencies maybe calculated incorrectly.

Remove the `NZCV` save and restore instructions from instrumentation
sequence because the instructions used for getting counter address,
counter increment and stack push/pop won't impact `NZCV`. And with
this, we can use `X1` to do counter increment and remove the two
instructions that saves and later restores `X2`.

Pull Request: https://github.com/llvm/llvm-project/pull/156357

The change adds a new HLFIR operation. A call to index intrinsic now
becomes lowered into the hlfir.index op and then naive lowering of the
op translates it back to appropriate runtime call. The change set is
aimed to be functionally equivalent to exiting index functionality, but
is much more efficient in a case of presence of the 'kind' intrinsic
parameter.
Also fixed couple of parameter lowering issues which were revealed while
working on the index-related functional parts.

This reverts commit 8d35bcc52117b79517f518de952b4b50463de160.

This was causing failures on MacOS due to the head command there not
supporting negative offsets. This patch fixes that by removing the call
to HEAD and relaxing the requirements around removing the last line of
the file.