Fix PR96127

Fix PR96127

In s390_expand_insv the movstrict patterns are always generated with a
CC clobber although only movstricthi actually needs one.  The patch
invokes the expanders instead of constructing the pattern by hand.

Bootstrapped and regression tested on s390x.

gcc/ChangeLog:

	PR target/96127
	* config/s390/s390.c (s390_expand_insv): Invoke the movstrict
	expanders to generate the pattern.
	* config/s390/s390.md ("*movstricthi", "*movstrictqi"): Remove the
	'*' to have callable expanders.

gcc/testsuite/ChangeLog:

	PR target/96127
	* gcc.target/s390/pr96127.c: New test.