Backport #5712 into `stable2409` from franciscoaguirre.

Now the XCM emulator has a log every time `execute_with` is called, to know
which chain is being used.
Also, the logs for UMP, DMP, HRMP processing were included in the `xcm` log filter
and changed from showing the message as an array of bytes to a hex string.
This means running the tests with `RUST_LOG=xcm` should give you everything you
need, you can always filter by `RUST_LOG=xcm::hrmp` or any other if you need it.

Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>