Add "v27.0.x" and "v27.1.x" options for "Docker Install URL"

[snasovich]

Is your feature request related to a problem? Please describe.
As part of rancher/rancher#46326 we're adding support for Docker 27.0.x and 27.1.x.

Describe the solution you'd like
UI dropdowns that allow picking "Docker Install URL" (e.g. on Node Template details page - not sure where else it may be referenced) should have the following new items available:

• "v27.1.x" choice that populates https://releases.rancher.com/install-docker/27.1.sh
• "v27.0.x" choice that populates https://releases.rancher.com/install-docker/27.0.sh

Note: Handling of default option (and addition of " (Recommended)" text) is handled via engine-install-url setting on backend that will be updated as part of rancher/rancher#46326 and should be validated on that issue.

Describe alternatives you've considered
Note "Docker Install URL" is editable and doesn't limit users to only the choices available, so they can specify other URLs manually as well before this enhancement is done.

Additional Information

See #10996 on how it was handled last time for Docker 26.1

Testing

To test, go to create a Digital Ocean cluster, click on 'Add Node Template', select a credential and click Next. Expand 'Engine Options' and verify that the new Docker Install URLs appear correctly, e.g.

[richard-cox]

/backport v2.9.next1