[MM-62553]+[MM-62554] Property Architecture: cursor based pagination (#30119)

* refactor: Replace pagination with cursor-based pagination for custom profile attributes

* remove pagination loop on property value retrieval for CPA

* add migrations to optimize pagination on property fields and values

* adapt test to remove pagination check

* update migrations list

* postgres: drop index concurrently

* concurrent index manipulation must be done outside of a Tx

* fix: Correct SQL index drop syntax from "OM" to "ON" in migration files

* test: Add CountForGroup test cases for property field store

* refactor: Add CountForGroup method to PropertyFieldStore interface and implementations

* Fix style and i18n

* feat: Add optional deleted property field filtering to CountForGroup method

* refactor: Update CountForGroup to support optional deleted property fields

* test: Add comprehensive tests for CountForGroup with includeDeleted parameter

* adapt test + gen layers

* rename property service method and set the includeDelete to false

* refactor: Remove redundant constant and use CustomProfileAttributesFieldLimit directly

* fix tests

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/store/timerlayer/timerlayer.go

@@ -7105,6 +7105,22 @@ func (s *TimerLayerProductNoticesStore) View(userID string, notices []string) er
 	return err
 }
 
+func (s *TimerLayerPropertyFieldStore) CountForGroup(groupID string, includeDeleted bool) (int64, error) {
+	start := time.Now()
+
+	result, err := s.PropertyFieldStore.CountForGroup(groupID, includeDeleted)
+
+	elapsed := float64(time.Since(start)) / float64(time.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("PropertyFieldStore.CountForGroup", success, elapsed)
+	}
+	return result, err
+}
+
 func (s *TimerLayerPropertyFieldStore) Create(field *model.PropertyField) (*model.PropertyField, error) {
 	start := time.Now()