Reworked Stam's patch after comments in:
https://gcc.gnu.org/pipermail/gcc-patches/2023-December/640362.html

The original gcc ChangeLog remains unchanged, but I did split up some tests so
here is the testsuite ChangeLog.


gcc/testsuite/ChangeLog:

	* gcc.target/arm/lob.h: Update framework.
	* gcc.target/arm/lob1.c: Likewise.
	* gcc.target/arm/lob6.c: Likewise.
	* gcc.target/arm/mve/dlstp-compile-asm.c: New test.
	* gcc.target/arm/mve/dlstp-int16x8.c: New test.
	* gcc.target/arm/mve/dlstp-int16x8-run.c: New test.
	* gcc.target/arm/mve/dlstp-int32x4.c: New test.
	* gcc.target/arm/mve/dlstp-int32x4-run.c: New test.
	* gcc.target/arm/mve/dlstp-int64x2.c: New test.
	* gcc.target/arm/mve/dlstp-int64x2-run.c: New test.
	* gcc.target/arm/mve/dlstp-int8x16.c: New test.
	* gcc.target/arm/mve/dlstp-int8x16-run.c: New test.
	* gcc.target/arm/mve/dlstp-invalid-asm.c: New test.