Replace node-sass with sass

The node-sass project is deprecated in favor of sass, written in dart.
Apparently node-sass doesn't compile for node@16, erroring out for
community contributors and team members alike. It seems like there is
not a quick fix available for this:

https://github.com/sass/node-sass/issues/3077

Given that the project is deprecated and we do not really use it for
anything time sensitive, we can surely just replace node-sass with sass.

package.json

@@ -233,11 +233,11 @@
     "md5": "^2.2.1",
     "miragejs": "^0.1.40",
     "mock-apollo-client": "^0.5.0",
-    "node-sass": "^4.14.1",
     "nodemon": "^2.0.4",
     "postcss": "^7.0.14",
     "prettier": "2.2.1",
     "readdir-enhanced": "^2.2.4",
+    "sass": "^1.32.12",
     "timezone-mock": "^1.0.8",
     "vue-jest": "4.0.1",
     "webpack-dev-server": "^3.11.2",

scripts/frontend/stylelint/stylelint-utility-map.js

 const fs = require('fs');
-const sass = require('node-sass');
 const path = require('path');
 const postcss = require('postcss');
 const prettier = require('prettier');
+const sass = require('sass');
 
 const utils = require('./stylelint-utils');