tests: Bluetooth: ascs: Add multiple parameters test cases

This adds 2 new test cases that test whether arrayed parameters are
handled properly.
This improves the existing test_codec_configure_invalid_ase_id_unavailable
test case by handling request conatining 2 ASE_ID's where the 1st is
invalid.
This reproduces the issue fixed in
419772db94238debe114dfac337f5b238a15436e.

Signed-off-by: Mariusz Skamra <mariusz.skamra@codecoup.pl>