Feature/python scripts update ios android dependencies

[vimanyu]

Script that updates versions of iOS Cocoapods and Android packages across various files in the repository,

• ios_pods/Podfile
• <firebase_product>/integration_tests/Podfile
• <firebase_product>/integration_tests_internal/Podfile
• Android/firebase_dependencies.gradle
• release_build_files/Android/firebase_dependencies.gradle
• release_build_files/readme.md
• */build.gradle

Simple usage of the script,
// To preview substitutions that will be made
python3 scripts/update_ios_android_dependencies.py --dryrun

// Update versions in default set of files in the repository
python3 scripts/update_ios_android_dependencies.py

For the scripts to work correctly, this PR had to be undone and older release notes format had to be restored. In the older format, there was atmost one dependency (pod or android package) specified per line and this made it way easier to read and process for regex substitutions.

For testing, I created a duplicate test branch and "zeroed" out all versions and ran the script. Here is the commit with the changes,
887da08

Also, Firebase/AdMob Cocoapod is now updated to Google-Mobile-Ads-SDK Cocoapod in the readme.

[jonsimantov]

Script that updates versions of iOS Cocoapods and Android packages across various files in the repository,

• ios_pods/Podfile
• <firebase_product>/integration_tests/Podfile
• Android/firebase_dependencies.gradle
• build_release_notes/readme.md

I didn't read through the PR yet, but it should also update release_build_files/Android/firebase_dependencies.gradle and product/integration_test_internal/Podfile - if it does that already, you should update the PR description. :)

[sunmou99]

As the iOS dependencies got updated at the same time.

• ios_pods/Podfile
• <firebase_product>/integration_tests/Podfile

I believe it's safe to remove the file and code here:
https://github.com/firebase/firebase-cpp-sdk/blob/main/scripts/gha/integration_testing/update_podfile.py
https://github.com/firebase/firebase-cpp-sdk/blob/main/scripts/gha/build_testapps.py#L521
(These codes are trying to fix iOS dependencies inconsistency.)

[vimanyu]

Script that updates versions of iOS Cocoapods and Android packages across various files in the repository,

• ios_pods/Podfile
• <firebase_product>/integration_tests/Podfile
• Android/firebase_dependencies.gradle
• build_release_notes/readme.md

I didn't read through the PR yet, but it should also update release_build_files/Android/firebase_dependencies.gradle and product/integration_test_internal/Podfile - if it does that already, you should update the PR description. :)

Awesome. Thanks for catching this. I didn't realize there was another firebase_dependencies file in the repo.
For Podfiles, I am recursively searching through the repo. So integration_tests_internal were being handled. Had to add android dependency file separately though.

[vimanyu]

I believe it's safe to remove the file and code here:
https://github.com/firebase/firebase-cpp-sdk/blob/main/scripts/gha/integration_testing/update_podfile.py
https://github.com/firebase/firebase-cpp-sdk/blob/main/scripts/gha/build_testapps.py#L521
(These codes are trying to fix iOS dependencies inconsistency.)

Great point Mou! I will handle the cleanup of these files (and corresponding code) in a separate PR and add you as a reviewer.

[sunmou99]

LGTM

[DellaBitta]

Approved with some nits.

[alexames]

I thought my comments went in yesterday but I guess I didn't hit the submit button.