[DW-1486] form versioning and cloud service enhancements (#5248)

* support form versions retrieval

* rework cloud services, reduce code duplication

* revert app config changes

* fix api spelling error

* support task form versioning

* turn TaskDetailsCloudModel into interface

* remove commented code

* fix test

* update tests

* remove useless provider declarations

lib/core/mock/form/widget-visibility-cloud.service.mock.ts

@@ -960,7 +960,7 @@ export const headerVisibilityCond: any = {
     'name': 'text_form',
     'description': '',
     'version': 0,
-    'standAlone': true,
+    'standalone': true,
     'formDefinition': {
         'tabs': [],
         'fields': [

lib/core/mock/form/widget-visibility.service.mock.ts

@@ -1006,7 +1006,7 @@ export const tabInvalidFormVisibility: any = {
     'name': 'tab-visibility',
     'description': '',
     'version': 0,
-    'standAlone': true,
+    'standalone': true,
     'tabs': [
         {
             'id': 'a8a4718d-5019-4852-9645-bba9b8253d86',