extract_url: init at 1.6.2 (#45624)

Squashed from:
* extract_url: init at 1.6.2
* extract_url: purify build
* extract_url: move src to more conventional place
* extract_url: don't unnecessarily propagate
* extract_url: use installFlags instead of patch
* extract_url: use URL literal instead of string
* extract_url: fix make flags style
* extract_url: remove PodChecker dependency