UI: Edit Metadata Template

[deepsidhu85]

What does this PR do and why?

Describe in detail what your merge request does and why.

This PR adds in the UI to edit metadata templates for projects and groups.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other pull requests.

Edit template dialog only enables the submit button when fields are added to the selected list and the name has a required attribute..however if a user tries to bypass these via inspect element the errors are caught and displayed in an alert:

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Login as [email protected]
2. Follow the instructions in UI: Create Metadata Template #923 to create a template
3. From the metadata templates listing, click Edit for the template
4. Verify that the available list doesn't include the selected items
5. Update the fields (remove and add some) and update the name (make note of which fields are in the selected list)
6. Verify in the table listing the template name has updated
7. Click Edit for the template again
8. Verify that the available list doesn't include the selected items and that the selected items now includes the items from the selected list in step 5, as well as the name

PR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the PR acceptance checklist for this PR.

[github-actions]

Code Metrics Report

Coverage	Test Execution Time
92.5%	10m50s

Code coverage of files in pull request scope (98.7%)

Files	Coverage
app/components/metadata_templates/table_component.html.erb	100.0%
app/components/metadata_templates/table_component.rb	100.0%
app/controllers/concerns/metadata_template_actions.rb	95.7%
app/controllers/groups/metadata_templates_controller.rb	100.0%
app/controllers/projects/metadata_templates_controller.rb	100.0%
app/views/groups/metadata_templates/edit.turbo_stream.erb	100.0%
app/views/groups/metadata_templates/update.turbo_stream.erb	100.0%
app/views/projects/metadata_templates/edit.turbo_stream.erb	100.0%
app/views/projects/metadata_templates/update.turbo_stream.erb	100.0%
app/views/shared/metadata_templates/_edit_template_dialog.html.erb	100.0%
app/views/shared/metadata_templates/_update.turbo_stream.erb	100.0%

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Reported by octocov