fix: scim use first email or phone if no primary is set (#9236)

# Which Problems Are Solved
- scim v2 only maps the primary phone/email to the zitadel user, this
does not work if no primary is set

# How the Problems Are Solved
- the first phone / email is mapped if no primary is available

# Additional Context
Part of #8140

Co-authored-by: Stefan Benz <[email protected]>

internal/api/scim/integration_test/testdata/users_create_test_no_primary_email_phone.json

@@ -0,0 +1,21 @@
+{
+  "schemas": [
+    "urn:ietf:params:scim:schemas:core:2.0:User"
+  ],
+  "userName": "acmeUser1",
+  "name": {
+    "familyName": "Ross",
+    "givenName": "Bethany"
+  },
+  "emails": [
+    {
+      "value": "[email protected]"
+    }
+  ],
+  "phoneNumbers": [
+    {
+      "value": "+41 71 123 45 67",
+      "type": "work"
+    }
+  ]
+}