[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/app/properties/property_field.go

@@ -19,6 +19,10 @@ func (ps *PropertyService) GetPropertyFields(ids []string) ([]*model.PropertyFie
 	return ps.fieldStore.GetMany(ids)
 }
 
+func (ps *PropertyService) CountActivePropertyFieldsForGroup(groupID string) (int64, error) {
+	return ps.fieldStore.CountForGroup(groupID, false)
+}
+
 func (ps *PropertyService) SearchPropertyFields(opts model.PropertyFieldSearchOpts) ([]*model.PropertyField, error) {
 	return ps.fieldStore.SearchPropertyFields(opts)
 }