ucm: add info-card substitution (Syntax 9)

ucm: add info-card substitution (Syntax 9)

Implement ${info-card:} substitution to retrieve specific fields from
a card's information structure by card number or ID. Unlike ${find-card:}
which searches through cards using regex, ${info-card:} directly queries
a specific card.

Arguments:
  card=<STR>   card number or card ID (string identifier)
  field=<STR>  number, id, driver, name, longname, mixername, components

Allow card and field parameters to reference UCM variables by prefixing
with $ character. When the first character is $, the value is resolved
using uc_mgr_get_variable().

Example usage:
  ${info-card:card=$MyCard,field=$MyField}

Signed-off-by: Jaroslav Kysela <perex@perex.cz>