Revise error message on conflicting templates

[vlada-shubina]

in case there are multiple templates coming from different group with same name the error message is confusing.

Revise error message:

• if short name are same and languages are same, the CTA should be to uninstall one of the packages
• if languages are different, suggest to use --language option
• if short names are different can stay as it (though it is unlikely case after moving to exact match on short name

TODO:

• Undo temporarily remove error message on ambiguous template group error #3276

[baronfel]

This sounds reasonable to me, though this is another thing that might be helped by better validation for template authors. Since we have the template manifest, during the Pack of a template we could emit a warning if the desired short name would conflict with another known tool. The idea would be to push this error to the author instead of to the template consumer.

[vlada-shubina]

The error message was fixed while migrating to new parser, the new output is below:

Unable to resolve the template, the following installed templates are conflicting:
Identity                         Template Name       Short Name     Language  Author      Package
%TABLE HEADER DELIMITER%
Invalid.SameShortName.TemplateA  Invalid.SameSho...  sameshortname            Test Asset  %TEMPLATE LOCATION%
Invalid.SameShortName.TemplateB  Invalid.SameSho...  sameshortname            Test Asset  %TEMPLATE LOCATION%

Uninstall the template packages containing the templates to keep only one template from the list or add the template options which differentiate the template to run.

This is not yet perfect, as still there is no way to run the templates that have same name. We plan to improve this behavior in #4135.