TSLint → ESLint (#21006)

* Alphabetized tslint and tsconfig files

* Optimized tsconfig files

* Optimized editorconfig & prettier config files

… to reduce redundancy

* Switched to @grafana/tsconfig

… and:
* de-duped options
* removed options with default values

* Fixed nasty issue with types for nested slate-react

* Replaced TSLint with ESLint

* TSLint disables → ESLint disables

… also JSHint removals, which haven’t had an affect since it was replaced with TSLint.

* Compliances for ESLint, Prettier and TypeScript

* Updated lockfile

devenv/e2e-api-tests/tsconfig.json

@@ -1,24 +1,21 @@
 {
-    "compilerOptions": {
-      "moduleResolution": "node",
-      "target": "es6",
-      "lib": ["es6"],
-      "module": "commonjs",
-      "declaration": false,
-      "allowSyntheticDefaultImports": true,
-      "inlineSourceMap": false,
-      "sourceMap": true,
-      "noEmitOnError": false,
-      "emitDecoratorMetadata": false,
-      "experimentalDecorators": true,
-      "noImplicitReturns": true,
-      "noImplicitThis": false,
-      "noImplicitUseStrict":false,
-      "noImplicitAny": false,
-      "noUnusedLocals": true
-    },
-    "include": [
-      "*.ts",
-      "**/*.ts"
-    ]
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "declaration": false,
+    "emitDecoratorMetadata": false,
+    "experimentalDecorators": true,
+    "inlineSourceMap": false,
+    "lib": ["es6"],
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "noEmitOnError": false,
+    "noImplicitAny": false,
+    "noImplicitReturns": true,
+    "noImplicitThis": false,
+    "noImplicitUseStrict": false,
+    "noUnusedLocals": true,
+    "sourceMap": true,
+    "target": "es6"
+  },
+  "include": ["*.ts", "**/*.ts"]
 }