Revert "Include autolinkin.h in OnLoad.cpp only if it exists (#47875)"

[cortinico]

Summary:

This reverts commit 5b2bbb8.

This is currently blocking reanimated as it's preventing the autolinked modules from being loaded. The fix is sadly not correct because the OnLoad.cpp file is available ONLY on New Architecture and the <autolinking.h> is always generated.

Changelog:

[INTERNAL] -

Test Plan:

N/A

[Dallas62]

Hello, I confirm it's blocking modules from being load on RN 0.76.4, could be great to release it fast since may lead to confusing issue. I detected it cause of RNCAsyncStorage Error and spend hours to cache clean, rebuild, ... After removing the throw on RNCAsyncStorage, found that other modules are not loaded. Despite the fact they are correctly generated via Codegen.
Maybe have a small CI test in addition to this fix (after), to prevent such blocking issue in a release ?
At least make sure a small project with Legacy Modules + TurboModule is able to start ?
Thanks for the reactivity of the investigation + revert PR !

[christocracy]

cause of RNCAsyncStorage Error and spend hours to cache clean, rebuild

Interesting. I don’t know much about TurboModules yet, but I did experience this phenomenon yesterday on a legacy project upgraded to 76.3.

eventually, I re-cloned my repo and it worked again.

[blakef]

Apologies, I've cherry-picked while working on conflicts from other picks. 94e2b5b