DevWorkspaces generated in che-devfile-registry build should use container contributions

[l0rd]

Is your enhancement related to a problem? Please describe

The che-devfile-registry builds pre-generates some devworkspace and devworkspacetemplates but still uses plugins when referencing editors and doesn't take advantage of container contributions.

Describe the solution you'd like

We should replace the usage of vscode and theia handlers when generating the devworkspaces and:

1. reference editors using spec.contributions rather than spec.template.components in DevWorkspaces definitions.
2. Use components with attribute controller.devfile.io/container-contribution: true rather than patching the original devfile spec in editors DevWorkspaceTemplates defintitions.

Additional context

This is part of #21736