chore: update package.json scripts for gn build and automated releases (#14612)

* Removes un-used and non-functional code coverage helpers
* Removes un-used release script aliases
* Moves TLS to a lib folder for cleaner directory structure
* Implements start.py as start.js for the GN build
* Adds a re-usable getElectronExec helper for future scripts
* Refactors spec runner to use the helper

script/lib/tls/index.js

@@ -0,0 +1,18 @@
+var fs = require('fs')
+var https = require('https')
+var path = require('path')
+
+var server = https.createServer({
+  key: fs.readFileSync(path.resolve(__dirname, 'tls.key.pem')),
+  cert: fs.readFileSync(path.resolve(__dirname, 'tls.cert.pem'))
+}, (req, res) => {
+  res.end(JSON.stringify({ protocol: req.socket.getProtocol() }))
+
+  setTimeout(() => {
+    server.close()
+  }, 0)
+})
+
+server.listen(0, () => {
+  console.log(server.address().port)
+})