dashboard: limit telemetry builders

- The x/telemetry repo depends on slog which requires at least go1.20.
- A dependency is not supported on plan9.

Change-Id: Ia2e911c160b9aa33e91a28133fd21bf65a754d53
Reviewed-on: https://go-review.googlesource.com/c/build/+/495760
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 28f054b..c523eb1 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -1294,7 +1294,7 @@
 // we only run them on servers and don't need to test the
 // many different architectures that Go supports (like ios).
 func linuxAmd64Repos(repo, branch, goBranch string) bool {
-	if repo == "pkgsite-metrics" {
+	if repo == "pkgsite-metrics" || repo == "telemetry" {
 		return atLeastGo1(goBranch, 20)
 	}
 	return true
@@ -3469,7 +3469,7 @@
 // both filesystem-intensive and unlikely to be relevant to plan9 users.
 func plan9Default(repo, branch, goBranch string) bool {
 	switch repo {
-	case "benchmarks":
+	case "benchmarks", "telemetry":
 		// Failure to build because of a dependency not supported on plan9.
 		return false
 	case "review":