Added Material UI 4 import rule to plugins/dynatrace

Signed-off-by: Aditya Kumar <aditya.kumar60@infosys.com>

.changeset/gorgeous-eels-cheat.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-dynatrace': patch
+---
+
+Added an optional ESLint rule - no-top-level-material-ui-4-imports -in dynatrace plugin which has an auto fix function to migrate the imports and used it to migrate the Material UI imports for plugins/dynatrace.

plugins/dynatrace/.eslintrc.js

@@ -1 +1,5 @@
-module.exports = require('@backstage/cli/config/eslint-factory')(__dirname);
+module.exports = require('@backstage/cli/config/eslint-factory')(__dirname, {
+    rules: {
+      '@backstage/no-top-level-material-ui-4-imports': 'error',
+    },
+  });

plugins/dynatrace/src/components/DynatraceTab/DynatraceTab.tsx

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 import React from 'react';
-import { Grid } from '@material-ui/core';
+import Grid from '@material-ui/core/Grid';
 import { Page, Content } from '@backstage/core-components';
 import {
   useEntity,

plugins/dynatrace/src/components/Synthetics/SyntheticsLocation/SyntheticsLocation.tsx

@@ -18,7 +18,7 @@ import React from 'react';
 import useAsync from 'react-use/lib/useAsync';
 import { Progress, ResponseErrorPanel } from '@backstage/core-components';
 import { useApi } from '@backstage/core-plugin-api';
-import { Chip } from '@material-ui/core';
+import Chip from '@material-ui/core/Chip';
 import { dynatraceApiRef } from '../../../api';
 
 type SyntheticsLocationProps = {