refactor(core): clear build config (#8268)

remove build config

allowLocalWorkspace -> FeatureFlag
enablePreloading -> removed
enableNewSettingUnstableApi -> removed
enableExperimentalFeature -> removed
enableThemeEditor -> FeatureFlag

remove some unused code

nx.json

@@ -81,9 +81,6 @@
     "test": {
       "outputs": ["{workspaceRoot}/.nyc_output"],
       "inputs": [
-        {
-          "env": "ENABLE_PRELOADING"
-        },
         {
           "env": "COVERAGE"
         }
@@ -92,9 +89,6 @@
     "test:ui": {
       "outputs": ["{workspaceRoot}/.nyc_output"],
       "inputs": [
-        {
-          "env": "ENABLE_PRELOADING"
-        },
         {
           "env": "COVERAGE"
         }
@@ -102,11 +96,7 @@
     },
     "test:coverage": {
       "outputs": ["{workspaceRoot}/.nyc_output"],
-      "inputs": [
-        {
-          "env": "ENABLE_PRELOADING"
-        }
-      ]
+      "inputs": []
     }
   }
 }