crypto: qat - add command queue telemetry counters for GEN6

Add slice-specific command queue counters for QAT GEN6 devices to monitor
utilization metrics, including wait time, execution duration, and release
events.

Update the documentation to reflect the new command queue counter
functionality.

Co-developed-by: George Abraham P <george.abraham.p@intel.com>
Signed-off-by: George Abraham P <george.abraham.p@intel.com>
Signed-off-by: Vijay Sundar Selvamani <vijay.sundar.selvamani@intel.com>
Signed-off-by: Suman Kumar Chakraborty <suman.kumar.chakraborty@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>