When building custom templates, we have `HasExample`[1] and
`HasImport`[2] available that return a boolean value and allow templates
to include conditionals. Some uses of this would be to only show either
an example or import line should the files exist. However, when we are
calling these for templates both data-sources and resources only pass in an
empty string[3] resulting in the value always returning `false`[4].

This appears to be an oversight as the non-customisable render template
call site correctly passes in the values[5] of these paths and the template
expression renders.

[1]: https://github.com/hashicorp/terraform-plugin-docs/blob/6e1a3339859e55625941bcef8ab365552235ca3b/internal/provider/template.go#L137
[2]: https://github.com/hashicorp/terraform-plugin-docs/blob/6e1a3339859e55625941bcef8ab365552235ca3b/internal/provider/template.go#L140
[3]: https://github.com/hashicorp/terraform-plugin-docs/blob/6e1a3339859e55625941bcef8ab365552235ca3b/internal/provider/generate.go#L420
[4]: https://github.com/hashicorp/terraform-plugin-docs/blob/e52e735a834db7cdbd980cc817989588c77d96d4/internal/provider/template.go#L198
[5]: https://github.com/hashicorp/terraform-plugin-docs/blob/6e1a3339859e55625941bcef8ab365552235ca3b/internal/provider/generate.go##L258