Describe the bug
Conditional imports have some problems:

1. By default, the source file path is not checked, which can only be enabled through an optional lint. I think it should be the other way around, disabling the check should be a lint. - Discussion in Conditional imports not checked #4525
2. There is no code completion for source file paths in conditional imports. Filename completion doesn't work for conditional imports #4530
3. Renaming a file does not trigger renaming of the conditional import path (possibly related to 2., as they are not parsed as file references?).