Compile assets when installing airflow from Github Branch in Breeze

[potiuk]

We have the option to install airflow from GitHub branc in Breeze (#54070) , but currently it does not complie assets and you can'r really "start-airflow" and see the UI properly when you install Breeze this way

The problem with it is that we currently run asset compilation outside of breeze - but the installation with --use-airflow-version already happens fully in breeze. And we have no node/yarn/pnpm installed in CI image.... The problem is that when we install from GitHub URL - we do not have local sources (which would be a different version) so even if you could run breeze command inside breeze (technically such inception shoud be possible- because we also forward docker socket to inside breeze) - what you really need is you need to:

1. install node + yarn + pnpm
2. find the directory in site-packages where airflow UI javascript sources are installed
3. run appropriate npm commands

Not a rocket science but it will take a bit of time to run, and it should be done somewhere here: https://github.com/apache/airflow/blob/main/scripts/in_container/install_airflow_and_providers.py#L767 -> this is where the command to install stuff when --use-airflow-version is actually executed - and "airflow-core" should be installed right after - you should probably naed to add a flag in the InstallationSpec (compile_assets) and set it to true somewhere here - https://github.com/apache/airflow/blob/main/scripts/in_container/install_airflow_and_providers.py#L325 - because this is where we determine what "pip install" to add based on the --use-airflow flag.