IAM: Implement update method in team API (#111660)

* implement team update in legacy store

* add unit tests

* add integration test

* set permissions for user in integration tests

* add more integration tests for update

* update validations

* add unit tests for ValidateOnUpdate() func

* fix integration test

pkg/tests/apis/iam/testdata/team-test-update-v0.yaml

@@ -0,0 +1,7 @@
+apiVersion: iam.grafana.app/v0alpha1
+kind: Team
+metadata:
+  name: test-team-1
+spec:
+  title: "Test Team 2"
+  email: testteam2@example123.com