build: Mac M1 support

[Eric-Warehime]

Summary

Updates Makefile for Mac M1 support. Currently only requires changes to account for linking to libraries installed in the new homebrew location /opt/homebrew.

Requires #3919 (I've included that commit in this branch since without it the build will fail).

Test Plan

Built and running on my personal M1 machine.
Also needs #3813 for CI support.

[algorandskiy]

Looks good. Looks like it spotted a data race in node.go

[brianolson]

lots of misc little changes in go.mod , was go mod tidy run?

[codecov-commenter]

Codecov Report

Merging #3920 (5d2152e) into master (f83e312) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3920      +/-   ##
==========================================
+ Coverage   49.79%   49.82%   +0.03%     
==========================================
  Files         409      409              
  Lines       68897    68903       +6     
==========================================
+ Hits        34305    34334      +29     
+ Misses      30888    30871      -17     
+ Partials     3704     3698       -6     

Impacted Files	Coverage Δ
crypto/secp256k1/panic_cb.go	0.00% <ø> (ø)
crypto/secp256k1/scalar_mult_cgo.go	77.77% <ø> (ø)
crypto/secp256k1/secp256.go	42.25% <ø> (ø)
libgoal/lockedFileLinux.go	0.00% <ø> (ø)
libgoal/lockedFileUnix.go	0.00% <ø> (ø)
nodecontrol/kmdControl_common.go	0.00% <ø> (ø)
tools/network/dnssec/config_unix.go	72.72% <ø> (ø)
util/process_common.go	0.00% <ø> (ø)
util/util.go	0.00% <ø> (ø)
node/node.go	23.89% <100.00%> (+0.70%)	⬆️
... and 12 more

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[Eric-Warehime]

I'm going to close this out since #3919 has ended up with the same set of changes and has the relevant review conversation in it. I originally thought it was going to be useful to separate the go updates and the M1 changes, but it doesn't seem productive at this point.