Strip multiple strings or, ideally, regex or glob from manual sync destination

I have this sync configuration in my `skaffold.yml`:
```
sync:
hooks:
before:
- container:
command: ["mkdir", "/test"]
manual:
- src: "*/target/classes/**/*.class"
dest: "/test/"
```

A file `moduleA/target/classes/A.class` is copied to `/test/moduleA/target/classes/A.class` and a file `moduleB/target/classes/B.class` is copied to `/test/moduleB/target/classes/B.class`.

To keep the package structure for java intact they would need to be copied to `/test/classes/A.class` and `/test/classes/B.class`.

This seems to be impossible without adding an entry to the list for each submodule. It would be great if the `strip` value could be a regex or glob. That way the sync definition could be the same no matter in which project it's used and wouldn't need to be adapted if new modules are added.

It could look like this:
```
sync:
hooks:
before:
- container:
command: ["mkdir", "/test"]
manual:
- src: "*/target/classes/**/*.class"
dest: "/test/"
strip: ".*/target/classes/"

```