Move monorepo-build CI to nightly runs (software-mansion#4677)

## Summary

Currently this CI is extremely slow and we often accidentally cancel
it/have to cancel it when we want to merge more often. With this change
it's only run when it's absolutely needed and on daily (nightly) basis.

.github/workflows/build-monorepo-nightly.yml

@@ -0,0 +1,8 @@
+on:
+  schedule:
+    - cron: '37 19 * * *' # at 21:37 every day
+  workflow_dispatch:
+
+jobs:
+  call-build-workflow-rea-v3:
+    uses: ./.github/workflows/build-monorepo.yml

.github/workflows/build-monorepo.yml

@@ -13,6 +13,13 @@ on:
   push:
     branches:
       - main
+    paths:
+      - .github/workflows/build-monorepo.yml
+      - .github/workflows/build-monorepo-action.yml
+      - RNReanimated.podspec
+      - scripts/reanimated_utils.rb
+      - android/build.gradle
+  workflow_call:
 
 jobs:
   build_android_reanimated_non_hoisted: