Enhance task query to select/exclude cross modules

[lefou]

Currently, the task query syntax (https://mill-build.org/mill/cli/query-syntax.html) is based on types. Since modules in Mill are Scala objects, each module has it's own type, so it is already possible to exclude modules from queries, e.g. to run all compile task except of module foo, you can exclude it by name :

> mill resolve __.compile
foo.compile
bar[one].compile
bar[two].compile
bar[three].compile
baz.compile

> mill resolve __:^foo.compile
bar[one].compile
bar[two].compile
baz.compile

It would be nice, to be able to also select/exclude specific cross module like this:

> mill resolve bar[_].compile
bar[one].compile
bar[two].compile
bar[three].compile

> mill resolve bar[_:^two].compile
bar[one].compile
bar[three].compile

[lefou]

My specific use case is the need to disable some specific test in CI (https://github.com/com-lihaoyi/mill/pull/5921).