Use meta.type parameter in templates to differentiate template types

[ebb-tide]

• Add meta.type string to templates when creating them from a resource. currently only dashboard and task and variable

• Add meta.type string to the static templates in static template repo.

• When user selects create dashboard from template, only display dashboard templates. (we can't currently pass query parameter that filters templates, but we can filter list of templates by type.)

• When user selects create task from template, only display task templates. (will be completed in Add create task from template option #14067

• Display the type of the template on the templates index page. (will be completed in Templates Index should display descriptions and type #14098)

[ebb-tide]

See #14081 for discussion and rationale