perf(cli): optimize CPU consumption of help pages (#9607)

This change reduces the CPU consumption of --help by ~50%.

Also, this change removes ANSI escape codes from our golden files. I
don't think those were worth the inability to parallelize golden file tests and
global state fragility.

cli/cliui/resources_internal_test.go

@@ -44,7 +44,7 @@ func TestRenderAgentVersion(t *testing.T) {
 		t.Run(testCase.name, func(t *testing.T) {
 			t.Parallel()
 			actual := renderAgentVersion(testCase.agentVersion, testCase.serverVersion)
-			assert.Equal(t, testCase.expected, actual)
+			assert.Equal(t, testCase.expected, (actual))
 		})
 	}
 }