Unit testing

[kshann]

Task/Issue URL: https://app.asana.com/0/72649045549333/1208137627434479/f

Description:
Adds unit tests for the following

• start_new_release action
• bump_build_number action
• update_asana_for_release action
• validate_internal_release_bump action

Also adds unit tests coverage for sub functionality in

• ddg_apple_automation_helper.rb
• asana_helper.rb

Minor bugfix for task processing,

• Fixed breaking out of loop early when completing multiple tasks

[kshann]

@ayoy Opted to raise this against your branch to make it easier to review changes. Hopefully we can review here, then version bump your branch and merge to main when we're happy. Coverage is unintentionally at 95.74%.