Refactor workspaces component-related code and specs

ee/lib/remote_development/README.md

...ib/remote_development/workspace_operations/create/main.rb

...ent/workspace_operations/create/main_component_updater.rb

...space_operations/create/post_flatten_devfile_validator.rb

...ce_operations/create/project_cloner_component_inserter.rb

...ce_operations/create/tools_injector_component_inserter.rb

.../workspace_operations/create/volume_component_inserter.rb

...lopment/example.invalid-unsupported-projects-devfile.yaml

...example.invalid-unsupported-starter-projects-devfile.yaml

...e_development/example.main-container-updated-devfile.yaml

....main-container-updated-marketplace-disabled-devfile.yaml

...ures/remote_development/example.processed-devfile-v2.yaml

...ixtures/remote_development/example.processed-devfile.yaml

...pment/example.processed-marketplace-disabled-devfile.yaml

..._development/example.project-cloner-inserted-devfile.yaml

..._development/example.tools-injector-inserted-devfile.yaml

...orkspace_operations/create/main_component_updater_spec.rb

...mote_development/workspace_operations/create/main_spec.rb

..._operations/create/post_flatten_devfile_validator_spec.rb

...e_operations/create/pre_flatten_devfile_validator_spec.rb