Plugin groups (#30320)

* add new pluginapi methods

* SAML login hook

* set ReAddRemovedMembers to true for plugin groups

* change to DoLogin signature for SAML

api/v4/source/groups.yaml

@@ -1040,6 +1040,59 @@
           schema:
             type: boolean
             default: false
+        - name: include_member_count
+          in: query
+          description: Boolean which adds a `member_count` field to each group object.
+          schema:
+            type: boolean
+            default: false
+        - name: include_timezones
+          in: query
+          description: Boolean which adds timezone information for group members.
+          schema:
+            type: boolean
+            default: false
+        - name: include_total_count
+          in: query
+          description: Boolean which adds total count of groups in the response.
+          schema:
+            type: boolean
+            default: false
+        - name: include_archived
+          in: query
+          description: Boolean which includes archived groups in the response.
+          schema:
+            type: boolean
+            default: false
+        - name: filter_archived
+          in: query
+          description: Boolean which filters out archived groups from the response.
+          schema:
+            type: boolean
+            default: false
+        - name: filter_parent_team_permitted
+          in: query
+          description: Boolean which filters groups based on parent team permissions.
+          schema:
+            type: boolean
+            default: false
+        - name: filter_has_member
+          in: query
+          description: User ID to filter groups that have this member.
+          schema:
+            type: string
+        - name: include_member_ids
+          in: query
+          description: Boolean which adds member IDs to the group objects.
+          schema:
+            type: boolean
+            default: false
+        - name: only_syncable_sources
+          in: query
+          description: Boolean which includes groups from syncable sources.
+          schema:
+            type: boolean
+            default: false
       responses:
         "200":
           description: Group list retrieval successful