Disable ISA-L on aarch64 architectures

[jrdi]

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Enabling ISA-L by default except on aarch64 architectures to fix compilation

Closes #49254

[Algunenano]

It seems that the problem is that CH is adding the ASM for different instruction sets unconditionally:

ClickHouse/contrib/isa-l-cmake/CMakeLists.txt

Lines 152 to 155 in dff3c0c

	${ISAL_SOURCE_DIR}/mem/mem_zero_detect_avx.asm
	${ISAL_SOURCE_DIR}/mem/mem_zero_detect_avx2.asm
	${ISAL_SOURCE_DIR}/mem/mem_zero_detect_avx512.asm
	${ISAL_SOURCE_DIR}/mem/mem_zero_detect_sse.asm

The original build system does distinguish between architectures:

https://github.com/ClickHouse/isa-l/blob/9f2b68f05752097f0f16632fc4a9a86950831efd/mem/Makefile.am#L32-L41

So contrib/isa-l-cmake/CMakeLists.txt should do too. But let's also have the option to disable it (added to this PR) like pretty much any other library. Even more since this is adding extra build dependencies.