aarch64: add support for partial modes to last extractions [PR118464]

aarch64: add support for partial modes to last extractions [PR118464]

The last extraction instructions work full both full and partial SVE vectors,
however we currrently only define them for FULL vectors.

Early break code for VLA now however requires partial vector support, which
relies on extract_last support.

I have not added any new testcases as they overlap with the existing Early
break tests which now fail without this.

gcc/ChangeLog:

	PR tree-optimization/118464
	PR tree-optimization/116855
	* config/aarch64/aarch64-sve.md (@extract_<last_op>_<mode>,
	@fold_extract_<last_op>_<mode>,
	@aarch64_fold_extract_vector_<last_op>_<mode>): Change SVE_FULL to
	SVE_ALL.
	* config/aarch64/iterators.md (vccore): Add more partial types.