chore(replay): Cleanup package.json scripts (#6348)

Clean up the replay integration's `package.json` by getting rid of a few ToDos, enabling the circular dependency check and using the eslint cache of the monorepo. 

Since the future of the demo app in the replay package is still unclear, I opted to repurpose and rename the `bootstrap` script so that it now only bootstraps the demo app. For the package itself, bootstrapping happens via a monorepo-level `yarn` command or `lerna bootstrap` command.

packages/replay/package.json

@@ -7,7 +7,6 @@
  "types": "build/npm/types/src/index.d.ts",
  "sideEffects": false,
  "scripts": {
- "bootstrap": "yarn && cd demo && yarn #TODO: change after migration",
  "build:rollup": "run-s build:worker build:core",
  "build": "run-s build:worker && run-p build:core build:types",
  "build:dev": "run-s build #TODO adjust after adding CDN bundles",
@@ -18,19 +17,18 @@
  "build:dev:watch": "yarn build:watch #TODO adjust after adding CDN bundles",
  "build:types:watch": "tsc -p tsconfig.types.json --watch",
  "build:npm": "ts-node ../../scripts/prepack.ts --bundles && npm pack ./build/npm",
- "circularDepCheck": "#TODO comment in after migration: madge --circular src/index.ts",
+ "circularDepCheck": "madge --circular src/index.ts",
  "clean": "rimraf build sentry-replay-*.tgz",
  "fix": "run-s fix:eslint fix:prettier",
  "fix:eslint": "eslint . --format stylish --fix",
  "fix:prettier": "prettier --write \"{src,test,scripts,worker}/**/*.ts\"",
  "lint": "run-s lint:prettier lint:eslint",
- "lint:eslint": "eslint . --format stylish #TODO: we might want to use eslintcache after migration",
+ "lint:eslint": "eslint . --cache --cache-location '../../eslintcache/' --format stylish",
  "lint:prettier": "prettier --check \"{src,test,scripts,worker}/**/*.ts\"",
  "test": "jest",
  "test:watch": "jest --watch",
- "start:demo": "yarn build:dev && cd demo && yarn start",
- "build:prod": "yarn build #TODO remove, we don't need this anymore after migration",
- "dev": "yarn build:dev:watch #TODO remove, we don't need this anymore after migration"
+ "bootstrap:demo": "cd demo && yarn",
+ "start:demo": "yarn build:dev && cd demo && yarn start"
  },
  "repository": {
  "type": "git",