[Fiber] Extract Functions that Call User Space and Host Configs in Commit to Separate Modules (#30881)

This is mostly just moves and same code extracted into utility
functions.

This is to help clarify what needs to be wrapped in try/catch and
runWithFiberInDEV. I'll do the runWithFiberInDEV changes in a follow up.

This leaves ReactCommitWork mostly to do matching on the tag and the
recursive loops.

DiffTrain build for commit fe03c56.

Author: sebmarkbage

compiled-rn/VERSION_NATIVE_FB

@@ -1 +1 @@
-19.0.0-native-fb-e10e8681-20240904
+19.0.0-native-fb-fe03c56d-20240905