BUG- `taipy migrate` is not working for taipy 3.1.0

[trgiangdo]

Description

When upgrading Taipy version, the user should be able to use taipy migrate command to upgrade taipy entities to work with the new version as well. However, the script is failing when upgrading entities from 3.1.0.dev0 to 3.2.0.dev0.

taipy migrate --repository-type filesystem                      
[2024-03-06 22:20:23][Taipy][INFO] Backed up entities from '.taipy/' to '.taipy/_backup' folder before migration.
[2024-03-06 22:20:23][Taipy][INFO] Starting entity migration from '.taipy/' folder.
[2024-03-06 22:20:23][Taipy][INFO] Migrating SCENARIOS
Traceback (most recent call last):
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/bin/taipy", line 8, in <module>
    sys.exit(_entrypoint())
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/_entrypoint.py", line 56, in _entrypoint
    _MigrateCLI.parse_arguments()
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate_cli.py", line 82, in parse_arguments
    cls.__migrate_entities(repository_type, repository_args, do_backup)
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate_cli.py", line 125, in __migrate_entities
    if not _migrate_fs_entities(path, do_backup):
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate/_migrate_fs.py", line 113, in _migrate_fs_entities
    entities, _ = _migrate(entities)
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate/_utils.py", line 303, in _migrate
    entities = __migrate_entities("SCENARIO", entities)
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate/_utils.py", line 287, in __migrate_entities
    v["data"] = migration_fct(v["data"], data)  # type: ignore
  File "/Users/trgiangdo/.local/share/virtualenvs/test-taipy-lMxhkYIZ/lib/python3.10/site-packages/taipy/core/_entity/_migrate/_utils.py", line 95, in __migrate_scenario
    scenario["tasks"] = __fetch_tasks_from_pipelines(scenario["pipelines"], data)
KeyError: 'pipelines'

Expected behavior

• The command should be better tested and work for different taipy version
• The ConfigCoreVersionMismatched exception should suggest the user to run the command to upgrade entities.

Acceptance Criteria

• [ ] Ensure new code is unit tested, and check code coverage is at least 90%
• [ ] Create related issue in taipy-doc for documentation and Release Notes if relevant