🏗 Remove gulp streaming from a few developer tasks

[rsimha]

This is another in a series of PRs that modernize our development tasks.

PR highlights:

• Remove gulp file streaming from server-tests, presubmit, caches-json, performance-urls, and get-zindex
• Opportunistic bugfixes:
  • Make file I/O async where possible
  • Add bing to the list of expected caches in caches.json
  • Fail task on parsing errors in caches-json and performance-urls
  • Minor logging cleanup

For easy reviewing (without whitespace-only changes), use this link: https://github.com/ampproject/amphtml/pull/32623/files?w=1

Partial fix for #32585

[rcebulko]

I think touching all of these files is a good opportunity to take advantage of async file I/O. There's a lot of disk reads that are blocking atm

[rsimha]

I think touching all of these files is a good opportunity to take advantage of async file I/O. There's a lot of disk reads that are blocking atm

All comments addressed. Also opportunistically cleaned up logging in presubmit. A+++ review, would request again.