Import Maps don't support package address targets with query parameters

Reproduce:
* Deno v1.23.3
* import_map.json:
```
{
"imports": {
"@mui/": "https://esm.sh/@mui/material@5.9.1/?alias=react:preact/compat,react/jsx-runtime:preact/compat/jsx-runtime&deps=preact@10.8.1"
}
}
```

Deno then reports back with:

> Package address targets must end with "/".

I couldn't find a current code snippet, but for version 1.9.1 I found [this check](https://deno.land/x/deno@v1.9.1/cli/import_map.rs#L216), which doesn't account for esm.sh alias feature, because it just checks the last character of the value string.

If you have any further questions, please let me know

Reproduce the report with Deno v1.23.3 and the import_map.json example, then compare the current implementation with the referenced cli/import_map.rs check from Deno v1.9.1. Confirm the expected behavior for package address targets containing query parameters and add or update coverage so the reproduction no longer reports the trailing-slash error.

Written by the indexing model from the issue text.