Add Render access review driver support

Register Render as an API-key connector provider and add an access
review driver that fetches workspace members from the Render API
(GET /v1/owners/{ownerId}/members).

Render exposes no partner OAuth program, so the connector authenticates
with a read-scoped API key (Authorization: Bearer) plus the customer's
Workspace ID. The flat members endpoint reports an explicit account
status and MFA flag, surfaced as the Active and MFAStatus fields; the
stable "usr-" id becomes ExternalID. There is no picker -- the
workspace is captured up front via ExtraSettings -- so
SetOrganizationSettings is omitted.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/accessreview/drivers/name_resolver_test.go

@@ -255,6 +255,76 @@ func TestQoveryNameResolver(t *testing.T) {
 	}
 }
 
+func TestRenderNameResolver(t *testing.T) {
+	t.Parallel()
+
+	t.Run("empty owner id returns nothing without HTTP call", func(t *testing.T) {
+		t.Parallel()
+
+		client := &http.Client{Transport: roundTripperFunc(func(*http.Request) (*http.Response, error) {
+			t.Fatalf("resolver should not make an HTTP call for an empty owner id")
+			return nil, nil
+		})}
+
+		got, err := NewRenderNameResolver(client, "").ResolveInstanceName(context.Background())
+		require.NoError(t, err)
+		assert.Empty(t, got)
+	})
+
+	cases := []struct {
+		name   string
+		status int
+		body   string
+		want   string
+	}{
+		{
+			name:   "200 returns name",
+			status: http.StatusOK,
+			body:   `{"id":"tea-test","name":"Acme Workspace","email":"ops@example.com","type":"team"}`,
+			want:   "Acme Workspace",
+		},
+		{
+			name:   "401 is terminal (no error, no name)",
+			status: http.StatusUnauthorized,
+			body:   `{"message":"unauthorized"}`,
+			want:   "",
+		},
+		{
+			name:   "404 is terminal (no error, no name)",
+			status: http.StatusNotFound,
+			body:   `{"message":"not found"}`,
+			want:   "",
+		},
+		{
+			name:   "500 is terminal (no error, no name)",
+			status: http.StatusInternalServerError,
+			body:   `{"message":"boom"}`,
+			want:   "",
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				assert.Equal(t, http.MethodGet, r.Method)
+				assert.Equal(t, "/v1/owners/tea-test", r.URL.Path)
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(tc.status)
+				_, _ = w.Write([]byte(tc.body))
+			}))
+			defer srv.Close()
+
+			client := &http.Client{Transport: &hostRewriter{target: srv.URL}}
+
+			got, err := NewRenderNameResolver(client, "tea-test").ResolveInstanceName(context.Background())
+			require.NoError(t, err)
+			assert.Equal(t, tc.want, got)
+		})
+	}
+}
+
 func TestTailscaleNameResolver(t *testing.T) {
 	t.Parallel()