gopls/internal/regtest/codelens: increase the timeout on TestGCDetails

Experiment with increasing the timeout for TestGCDetails, given how its
flakiness correlates with slow builders.

For golang/go#44099

Change-Id: I27a8732256a77c3d9ce2a1b1f75ce5d0fbc11e67
Reviewed-on: https://go-review.googlesource.com/c/tools/+/289690
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>

gopls/internal/regtest/codelens/codelens_test.go

@@ -8,6 +8,7 @@ import (
 	"runtime"
 	"strings"
 	"testing"
+	"time"
 
 	. "golang.org/x/tools/gopls/internal/regtest"
 
@@ -296,6 +297,8 @@ func main() {
 			CodeLenses: map[string]bool{
 				"gc_details": true,
 			}},
+		// TestGCDetails seems to suffer from poor performance on certain builders. Give it some more time to complete.
+		Timeout(60*time.Second),
 	).Run(t, mod, func(t *testing.T, env *Env) {
 		env.OpenFile("main.go")
 		env.ExecuteCodeLensCommand("main.go", source.CommandToggleDetails)