[BUGFIX release] Ensure query param only link-to's work in error states.

[2hu12]

Try to fix #17963, I'm not sure this is the right way and it's weird, but the old "qualifiedRouteName" property works in this way and "_route" is used similarly to "qualifiedRouteName".

[rwjblue]

The fix seems reasonable (thank you!), but I think we need to add a previously failing test to ensure we don't regress again...

[2hu12]

I try to add one test in "packages/@ember/-internals/glimmer/tests/integration/components/link-to/query-params-curly-test.js", but with no success. The test need an {{#link-to}} with no route parameter and the bug could be reproduced when transition to an error route which might have a rejected model, but when it encounters an error like model() { RSVP.reject(new Error('some error')) } in test, the whole test just terminated.

@rwjblue Do you have any idea on how to write this previously failing test? Thank you!

[villander]

@rwjblue @dgeb any idea about this? We are with ember-engines CI broken.

I'll be happy if you can add any tip to finish this, thanks

[villander]

we are trying fix this on engines side as well - ember-engines/ember-engines#647

[villander]

@2hu12 unfortunately I don't was able to write tests for this =/

[rwjblue]

I just rebased and pushed a previously failing test (using the one @dgeb started over in #18061), once CI is green we should be good to go.

[villander]

thanks @rwjblue