gopls/internal/regtest/diagnostics: skip Test_Issue38211

This test has a high failure rate on the builders. Adding a skip until
it is fixed so that we will more easily notice other regressions.

For golang/go#44098

Change-Id: I8dcd6b205a5a7876d2a16c54f3c19c1bb0397843
Reviewed-on: https://go-review.googlesource.com/c/tools/+/363614
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

gopls/internal/regtest/diagnostics/diagnostics_test.go

@@ -638,6 +638,8 @@ var ErrHelpWanted error
 
 // Test for golang/go#38211.
 func Test_Issue38211(t *testing.T) {
+	t.Skipf("Skipping flaky test: https://golang.org/issue/44098")
+
 	testenv.NeedsGo1Point(t, 14)
 	const ardanLabs = `
 -- go.mod --