build: Re-enable openssl asm for arm64
Re-enable openssl asm for arm64.
In #23913 (closed) it looked like arm64 testing was flaky, and as a result a number of changes were made including disabling openssl asm for that architecture.
This PR is limited to re-enabling the one change to turn on openssl asm for arm64, in the hopes that either it works now, or that this specific change introduces a reproducible condition that shows up with testing.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines