[Swarming]Pull and push utask_main tasks to Swarming queues

[IvanBM18]

Description

This change updates run_bot.py to fetch tasks from both the default UTASK_MAIN_QUEUE and the corresponding Swarming queue if the SWARMING_REMOTE_EXECUTION feature flag is enabled. This allows bots to process tasks intended for Swarming execution.

It also introduces get_target_runtime to determine the appropriate execution environment (Batch, Swarming, or Kata Container) for a given job based on its environment variables. This information is now included in the task's extra_info.

• Why: This was added so that the Pub/Sub queue can automatically filter messages into the appropriate Swarming subscription based on the target runtime.

Changes

• run_bot.py: Fetch from both default and swarming queues if feature flag is enabled.
• tasks.py: Added get_target_runtime and updated add_task to include target_runtime in extra_info.
• Tests: Added unit tests for get_target_runtime and verified run_bot behavior with both queues.

Test

• Run unit tests: python butler.py py_unittest -t core -p tasks_test.py and run_bot_test.py.

Note

This PR is a draft because their changes are dependant on this other pr so please go ahead and review that one first