5.15-stable patches

5.15-stable patches

added patches:
	selftests-rseq-change-type-of-rseq_offset-to-ptrdiff_t.patch
	selftests-rseq-fix-ppc32-missing-instruction-selection-u-and-x-for-load-store.patch
	selftests-rseq-fix-ppc32-offsets-by-using-long-rather-than-off_t.patch
	selftests-rseq-fix-ppc32-wrong-rseq_cs-32-bit-field-pointer-on-big-endian.patch
	selftests-rseq-fix-warnings-about-if-checks-of-undefined-tokens.patch
	selftests-rseq-fix-work-around-asm-goto-compiler-bugs.patch
	selftests-rseq-introduce-own-copy-of-rseq-uapi-header.patch
	selftests-rseq-introduce-rseq_get_abi-helper.patch
	selftests-rseq-introduce-thread-pointer-getters.patch
	selftests-rseq-remove-arm-mips-asm-goto-compiler-work-around.patch
	selftests-rseq-remove-array_size-define-from-individual-tests.patch
	selftests-rseq-remove-useless-assignment-to-cpu-variable.patch
	selftests-rseq-remove-volatile-from-__rseq_abi.patch
	selftests-rseq-uplift-rseq-selftests-for-compatibility-with-glibc-2.35.patch
	selftests-rseq-x86-32-use-gs-segment-selector-for-accessing-rseq-thread-area.patch
	selftests-rseq-x86-64-use-fs-segment-selector-for-accessing-rseq-thread-area.patch