benchmarks/gem_wsim: Extend engine selection syntax

This patch introduces a more flexible and detailed approach to
specifying engines.
The tool now dynamically generates a list of available physical engines
by querying the device, moving away from a static enumeration of engine
IDs.
Engines are now identified using [class:instance:gt] tuples.
This approach accommodates the specification of engine instances in the
format `engine_class[<engine_instance>-<gt_id>]`, enhancing the
granularity of engine selection, ex. First VCS engine may be specified
as VCS, VCS1, and VCS1-0.
The patch adds support for the compute engine class (CCS).
To maintain compatibility with existing workload definitions, the patch
ensures that 1-based engine instance IDs are preserved.

v2: Correct unbalanced braces, indentation.

Signed-off-by: Marcin Bernatowicz <marcin.bernatowicz@linux.intel.com>
Acked-by: Kamil Konieczny <kamil.konieczny@linux.intel.com>