Fix assetcatalog_generated_info.plist path in copy resources phase

Remove unused #specific_source attribute

Remove all PBX state from targets, improve project generation performance

Prevent duplicated targets from being stripped out from the framework search paths

Always ensure indentation level resets in UI

Always generate FRAMEWORK_SEARCH_PATHS for vendored_frameworks

Fix determining whether specs are test-only when there are multiple target definitions

Yes, improving performance again

This saves almost 2 seconds on our project

This also allows up to only create the `Local Podspecs` dir once

This brings the time down from 90s to 4s for us, by reducing the amount of times we perform graph traversal from something like O(x^n^n) to O(log n)