ALSA: seq: Print UMP Endpoint and Block information in proc outputs

This patch enhances the /proc/asound/seq/clients output to show a few
more information about the assigned UMP Endpoint and Blocks.

The "Groups" are shown in 1-based group number to align with the
sequencer client name and port number.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-36-tiwai@suse.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>