Make unit tests faster

[jonjohnsonjr]

I was flummoxed to find that go test ./... was both very slow and did not work. The very slowness comes from a couple sources. One is that we use a 1 QPS rate limiter in a lot of places, even when we are using an in-process http server to serve up testdata. I've removed those instances. In one particular python test, we are fetching a 10MB targz from the internet twice. I've gated that behind an e2e build tag, so to run that test you need to execute:

go test -tags e2e ./...

That's cumbersome, so I've added it to the make test target.

I've also added the e2e build tag to the go fips generated APK test because it requires you to first generate a binary before the test will pass. This is unacceptable to me, so the make test target will still test that, but go test ./... will not.

Before:

go test -count=1 ./...
?   	chainguard.dev/melange	[no test files]
?   	chainguard.dev/melange/docs	[no test files]
?   	chainguard.dev/melange/internal/contextreader	[no test files]
?   	chainguard.dev/melange/internal/gen-jsonschema	[no test files]
?   	chainguard.dev/melange/internal/logwriter	[no test files]
?   	chainguard.dev/melange/pkg/cli	[no test files]
?   	chainguard.dev/melange/pkg/container	[no test files]
?   	chainguard.dev/melange/pkg/container/dagger	[no test files]
?   	chainguard.dev/melange/pkg/container/docker	[no test files]
ok  	chainguard.dev/melange/pkg/build	0.352s
ok  	chainguard.dev/melange/pkg/cond	0.424s
?   	chainguard.dev/melange/pkg/convert/github	[no test files]
?   	chainguard.dev/melange/pkg/convert/relmon	[no test files]
?   	chainguard.dev/melange/pkg/http	[no test files]
ok  	chainguard.dev/melange/pkg/config	0.553s
?   	chainguard.dev/melange/pkg/linter/defaults	[no test files]
?   	chainguard.dev/melange/pkg/manifest	[no test files]
?   	chainguard.dev/melange/pkg/renovate	[no test files]
?   	chainguard.dev/melange/pkg/renovate/cache	[no test files]
ok  	chainguard.dev/melange/pkg/container/k8s	0.738s
ok  	chainguard.dev/melange/pkg/convert/apkbuild	0.224s
ok  	chainguard.dev/melange/pkg/convert/gem	5.139s
ok  	chainguard.dev/melange/pkg/convert/python	37.305s
ok  	chainguard.dev/melange/pkg/convert/wolfios	1.257s
ok  	chainguard.dev/melange/pkg/index	0.891s
ok  	chainguard.dev/melange/pkg/linter	1.309s
ok  	chainguard.dev/melange/pkg/renovate/bump	1.267s
ok  	chainguard.dev/melange/pkg/sbom	1.267s
ok  	chainguard.dev/melange/pkg/sca	1.414s
ok  	chainguard.dev/melange/pkg/sign	1.328s
ok  	chainguard.dev/melange/pkg/util	1.397s

After:

go test -count=1 ./...
?   	chainguard.dev/melange	[no test files]
?   	chainguard.dev/melange/docs	[no test files]
?   	chainguard.dev/melange/internal/contextreader	[no test files]
?   	chainguard.dev/melange/internal/gen-jsonschema	[no test files]
?   	chainguard.dev/melange/internal/logwriter	[no test files]
?   	chainguard.dev/melange/pkg/cli	[no test files]
?   	chainguard.dev/melange/pkg/container	[no test files]
?   	chainguard.dev/melange/pkg/container/dagger	[no test files]
?   	chainguard.dev/melange/pkg/container/docker	[no test files]
ok  	chainguard.dev/melange/pkg/build	0.352s
ok  	chainguard.dev/melange/pkg/cond	0.473s
ok  	chainguard.dev/melange/pkg/config	0.602s
?   	chainguard.dev/melange/pkg/convert/github	[no test files]
?   	chainguard.dev/melange/pkg/convert/relmon	[no test files]
?   	chainguard.dev/melange/pkg/http	[no test files]
?   	chainguard.dev/melange/pkg/linter/defaults	[no test files]
?   	chainguard.dev/melange/pkg/manifest	[no test files]
?   	chainguard.dev/melange/pkg/renovate	[no test files]
?   	chainguard.dev/melange/pkg/renovate/cache	[no test files]
ok  	chainguard.dev/melange/pkg/container/k8s	0.834s
ok  	chainguard.dev/melange/pkg/convert/apkbuild	0.183s
ok  	chainguard.dev/melange/pkg/convert/gem	0.336s
ok  	chainguard.dev/melange/pkg/convert/python	1.593s
ok  	chainguard.dev/melange/pkg/convert/wolfios	1.083s
ok  	chainguard.dev/melange/pkg/index	0.989s
ok  	chainguard.dev/melange/pkg/linter	1.379s
ok  	chainguard.dev/melange/pkg/renovate/bump	1.197s
ok  	chainguard.dev/melange/pkg/sbom	1.292s
ok  	chainguard.dev/melange/pkg/sca	1.404s
ok  	chainguard.dev/melange/pkg/sign	1.369s
ok  	chainguard.dev/melange/pkg/util	1.440s