Compatibility tests fail on ARM architectures

[jwair]

Compatibility tests try to download Consul and they are constructing download URLs (from releases.hashicorp.com) for the architecture on which the tests are running.
Prior to Consul 1.10.11, there are no Consul releases for darwin arm64 so the constructed URL (e.g. https://releases.hashicorp.com/consul/1.8.16/consul_1.8.16_darwin_arm64.zip) returns a 404.

The compatibility test fails with an error. E.g.

...
        	Error Trace:	consul_test.go:452
        	            				consul_test.go:104
        	Error:      	Received unexpected error:
        	            	bad response code: 404
...