Rename aarch64_linux tag to arm64_linux

[Bo98]

Alternative to and closes #19183.

Lightly tested but it seems to work for a basic brew install at least.

[MikeMcQuaid]

Yup, this is exactly what I had in mind. Thanks so much for this @Bo98, looks great! One tiny suggested documentation change; optional so feel free to take it or leave it.

[Bo98]

Been trying to ask around for opinions (just to make sure the majority agrees since I don't want to have to hack about backtracking this if anyone changes their mind) but FOSDEM is loud so haven't really been able to. Sean I think votes for this PR, while Carlo and Markus vote for the other PR. Could ask the TSC channel. Or maybe whole membership at AGM if preferred.

I don't really have a strong opinion either way - I understand the argument for both cases.

[MikeMcQuaid]

@Bo98 We can wait and discuss this at/around the AGM tomorrow, no rush here 👍🏻

[MikeMcQuaid]

Also, just to be explicit: this is a design/product decision more than a technical decision; it's about what "interface" we provide for our users/contributors/etc. and when/whether we want to be consistent/not with other platforms. As a result, I don't expect this to be a vote but instead be a discussion that we could have and then reach an outcome from that.

[MikeMcQuaid]

Merging after final conversation with @carlocab and @ZhongRuoyu in person at the AGM where I made the final decision to go with ARM64 for now but we will reconsider using AARCH64 instead before we "officially support" the platform if we get sufficient community feedback indicating it's a better fit.

[Bo98]

we will reconsider using AARCH64 instead before we "officially support" the platform if we get sufficient community feedback

I will be pushing a Portable Ruby soon using the bottle tag picked here so would rather not be switching back and forth down the line.

[MikeMcQuaid]

I will be pushing a Portable Ruby soon using the bottle tag picked here so would rather not be switching back and forth down the line.

We do not plan to switch back ere, was just being explicit after conversation with @ZhongRuoyu that we could do this is sufficient community feedback meant that we realised arm64 was an overwhelmingly bad decision. We are 👍🏻 to proceed with everything arm64 for the indefinite future.