Find an elegant way to determine the ARCH in the Makefile.

[jeff-mccoy]

We'll need to add an issue to find an elegant way to determine the ARCH in the Makefile.

The current way doesn't break local e2e testing on arm architectures, but it will be slower because they will always build all the packages as part of the make test-e2e

Originally posted by @YrrepNoj in #392 (review)

[anoncam]

An alternate to uname on mac is the arch command. So after your initial ifeq ... Darwin ... you can use a single arch command to get the processor architecture arm, arm64 or amd64/i386...

The outputs here kinda illustrate what I'm trying to relay:

➜  zsh-z git:(develop) uname -s
Darwin
➜  zsh-z git:(develop) uname -p
arm
➜  zsh-z git:(develop) # arm may be too generic
➜  zsh-z git:(develop) arch
arm64

[anoncam]

roger that. i'll take a look at the pipelines

[jeff-mccoy]

I think this was reasonable handled in #428 by allowing default + overrides for the arch coming into the makefile.