Auto merge of #18220 - cosmo0920:detect-aarch64-in-mach, r=jdm
Auto merge of #18220 - cosmo0920:detect-aarch64-in-mach, r=jdm

Handle aarch64 cpu_type in mach

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This is a PR for #18217.

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- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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