[RN][iOS] Disable Bitcode for Hermes

[cipolleschi]

Summary:

Backports the commit de6bfec to 0.72.

Disabling the Bitcode has several benefits:

1. Downloading artifacts while testing will take much less time
2. Creating a new app will take less time
3. The Space occupied on Dev's machine is sensibly smaller

Community testing reported that the tarball size get reduced from ~500 Mb to ~25 Mb, a x20 reduction

Changelog:

[iOS][Changed] - Disabled bitcode for Hermes prebuilts

Test Plan:

Wait for CircleCI...