Remove excessive .babelrc (#6493)

* Remove excessive babelrc

* wip

* Restore styled-components plugin

* fix

.babelrc

@@ -1,29 +1,28 @@
 {
   "presets": [
     "@babel/preset-react",
-    "@babel/preset-typescript",
-    [
-      "@babel/preset-env",
-      {
-        "corejs": {
-          "version": "3",
-          "proposals": true
-        },
-        "useBuiltIns": "usage"
-      }
-    ]
+    "@babel/preset-env",
+    "@babel/preset-typescript"
   ],
   "plugins": [
-    "styled-components",
+    "babel-plugin-transform-typescript-metadata",
     [
       "@babel/plugin-proposal-decorators",
       {
         "legacy": true
       }
     ],
-    "@babel/plugin-transform-destructuring",
-    "@babel/plugin-transform-regenerator",
-    "transform-class-properties"
+    "@babel/plugin-proposal-class-properties",
+    [
+      "transform-inline-environment-variables",
+      {
+        "include": [
+          "SOURCE_COMMIT",
+          "SOURCE_VERSION"
+        ]
+      }
+    ],
+    "tsconfig-paths-module-resolver"
   ],
   "env": {
     "production": {
@@ -36,13 +35,29 @@
         ]
       ],
       "ignore": [
+        "**/__mocks__",
         "**/*.test.ts"
       ]
     },
     "development": {
       "ignore": [
+        "**/__mocks__",
         "**/*.test.ts"
       ]
+    },
+    "test": {
+      "presets": [
+        [
+          "@babel/preset-env",
+          {
+            "corejs": {
+              "version": "3",
+              "proposals": true
+            },
+            "useBuiltIns": "usage"
+          }
+        ]
+      ]
     }
   }
 }