react-markdown: Upgrade to version 8.0.7 to be compatible with rollup

J=CLIP-1321
TEST=manual|auto

Ran `npm run test` and `npm run build` to ensure no errors

jest.config.json

@@ -11,10 +11,9 @@
   "restoreMocks": true,
   "clearMocks": true,
   "testMatch": ["<rootDir>/tests/**/*.(test).ts(x)?"],
+  "$comment": "react-markdown throws syntax errors (ESM-related). This imports the .js file directory without issue",
   "moduleNameMapper": {
-    "\\.(css|scss|less)$": "<rootDir>/tests/__utils__/style-mock.ts",
     "react-markdown": "<rootDir>/node_modules/react-markdown/react-markdown.min.js"
   },
-  "transformIgnorePatterns": ["/node_modules/(?!react-markdown)/react-markdown.min.js"],
   "setupFilesAfterEnv": ["<rootDir>/tests/__setup__/setup.js"]
 }