[bug]: omegaconf migration flag does not work from inventory with reclass

[jmmclean]

Description of the bug

couple issues:

1. it seems omegaconf is much pickier than reclass for .yml v .yaml file extension; if .yaml is used within the inventory, errors will be thrown
2. the --migrate flag does not convert reclass variable reference (ie ${external_dns:component_name}) to omegaconf (ie ${external_dns.component_name})

Steps to reproduce

1. create an inventory that is reclass compatible with variable reference (something like `${external_dns:component_name}`) - ensure a kapitan compile works
2. try to run the omegaconf migration using `kapitan compile --inventory-backend omegaconf --migrate`. This will trigger an error

What happened?

an error, similar to the below will be seen

> kapitan compile --inventory-backend omegaconf --migrate
azr-westus-dca-wl-prd-001: could not render due to error Unsupported interpolation type cert_manager
    full_key: kapitan.compile[0].output_path
    object_type=dict
aws-us-east-1-dca-wl-lab-002: could not render due to error Unsupported interpolation type cert_manager
    full_key: kapitan.compile[0].output_path
    object_type=dict
aws-us-west-2-dca-wl-prd-002: could not render due to error Unsupported interpolation type cert_manager
    full_key: kapitan.compile[0].output_path
    object_type=dict
aws-us-west-2-dca-wl-prd-001: could not render due to error Unsupported interpolation type cert_manager
    full_key: kapitan.compile[0].output_path
    object_type=dict
Error while loading the OmegaConf inventory
Traceback (most recent call last):
  File "/opt/venv/bin/kapitan", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/opt/venv/lib/python3.11/site-packages/kapitan/cli.py", line 639, in main
    args.func(args)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/cli.py", line 76, in trigger_compile
    compile_targets(
  File "/opt/venv/lib/python3.11/site-packages/kapitan/targets.py", line 42, in compile_targets
    inventory = get_inventory(inventory_path)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/venv/lib/python3.11/site-packages/kapitan/resources.py", line 345, in get_inventory
    inventory_backend = backend(
                        ^^^^^^^^
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inventory/backends/omegaconf/__init__.py", line 69, in __init__
    super().__init__(*args, **kwargs, target_class=OmegaConfTarget)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inventory/inventory.py", line 51, in __init__
    self.__initialise(ignore_class_not_found=ignore_class_not_found)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inventory/inventory.py", line 92, in __initialise
    self.render_targets(self.targets, ignore_class_not_found=ignore_class_not_found)
  File "/opt/venv/lib/python3.11/site-packages/kapitan/inventory/backends/omegaconf/__init__.py", line 84, in render_targets
    raise OmegaConfRenderingError("Error while loading the OmegaConf inventory")
kapitan.inventory.backends.omegaconf.OmegaConfRenderingError: Error while loading the OmegaConf inventory

Additional context

More information can be found within this discussion - https://github.com/orgs/kapicorp/discussions/1007

Manually changing the reclass notation to omegaconf notation made the compile work, however I would have expected the --migrate flag to handle this

I created a function to wrap kapitan, below

> which kapitan
kapitan () {
	docker run -t --rm -u $(id -u) -v $(pwd):/src:delegated kapicorp/kapitan:0.34.4-linux-arm64 $@
}

Version (kapitan)

master

Version (kapitan)

I use kapitan directly (pip, docker)

Python virtual environment

• pyenv
• venv
• no environment

OS information

No response

Relevant log output

No response