* move set_module_args to units.modules.utils
* unit tests: reuse set_module_args
* unit tests: mock exit/fail_json in module.utils.ModuleTestCase
* unit tests: use module.utils.ModuleTestCase
* unit tests: fix 'import shadowed by loop variable'
* Fix rollback in junos_config
Fixes#30778
* Call `load_configuration` with rollback id in case
the id is given as input
* Pass rollback id to `get_diff()` to fetch diff from device
* Fix unit test
* junos_linkagg implementation and junos modules refactor
* junos_linkagg implementation
* junos_linkagg integration test
* net_linkagg integration test for junos
* decouple `load_config` and `commit` operations,
to allow single commit (in case on confirm commit) and
to perform batch commit (multiple `load_config` followed by single
`commit`)
* Other related refactor
* Fix CI issues
* Fix unit test failure
