dashboard: stop running macOS builders

All of them have been ported to LUCI. Stop running the previous ones
and disable their health check.

For golang/go#67761.

Change-Id: I1128322aa216341641878c785773339bffcf799e
Reviewed-on: https://go-review.googlesource.com/c/build/+/589659
Reviewed-by: Michael Pratt <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>

Author: dmitshur

cmd/coordinator/status.go

@@ -144,7 +144,6 @@ func addHealthChecker(mux *http.ServeMux, hc *healthChecker) {
 var basePinErr atomic.Value
 
 func addHealthCheckers(ctx context.Context, mux *http.ServeMux, sc *secret.Client) {
-	addHealthChecker(mux, newMacOSARM64Checker())
 	addHealthChecker(mux, newBasepinChecker())
 	addHealthChecker(mux, newGitMirrorChecker())
 	addHealthChecker(mux, newGitHubAPIChecker(ctx, sc))

dashboard/builders_test.go

@@ -657,7 +657,11 @@ func TestBuilderConfig(t *testing.T) {
 			}
 			gotPost := bc.BuildsRepoPostSubmit(tt.br.repo, tt.br.branch, tt.br.goBranch)
 			if tt.want&isBuilder != 0 && !gotPost {
-				t.Errorf("not a post-submit builder, but expected")
+				if stopped := migration.BuildersPortedToLUCI[bc.Name] && migration.StopPortedBuilder(bc.Name); stopped {
+					t.Logf("not a post-submit builder because it's intentionally stopped")
+				} else {
+					t.Errorf("not a post-submit builder, but expected")
+				}
 			}
 			if tt.want&notBuilder != 0 && gotPost {
 				t.Errorf("unexpectedly a post-submit builder")

internal/migration/migration.go

@@ -90,6 +90,7 @@ var BuildersPortedToLUCI = map[string]bool{
 // instead of just made invisible in the web UI.
 func StopPortedBuilder(builderName string) (stop bool) {
 	nameKeyList := []string{
+		"darwin-",
 		"linux-loong64",
 		"linux-ppc64",
 		"-wasm-",