cmd/tailscale/cli,feature: add support for identity federation (#17529)

Add new arguments to `tailscale up` so authkeys can be generated dynamically via identity federation.

Updates #9192

Signed-off-by: mcoulombe <max@tailscale.com>

cmd/tailscaled/deps_test.go

@@ -137,14 +137,14 @@ func TestOmitCaptivePortal(t *testing.T) {
 	}.Check(t)
 }
 
-func TestOmitOAuthKey(t *testing.T) {
+func TestOmitAuth(t *testing.T) {
 	deptest.DepChecker{
 		GOOS:   "linux",
 		GOARCH: "amd64",
-		Tags:   "ts_omit_oauthkey,ts_include_cli",
+		Tags:   "ts_omit_oauthkey,ts_omit_identityfederation,ts_include_cli",
 		OnDep: func(dep string) {
 			if strings.HasPrefix(dep, "golang.org/x/oauth2") {
-				t.Errorf("unexpected dep with ts_omit_oauthkey: %q", dep)
+				t.Errorf("unexpected oauth2 dep: %q", dep)
 			}
 		},
 	}.Check(t)