feature: worker thread in immediate command list

[lslusarczyk]

Related-To: NEO-13856

[MichalMrozek]

how do you ensure on host synchronize calls that all submissions were properly processed in async thread?

[lslusarczyk]

how do you ensure on host synchronize calls that all submissions were properly processed in async thread?

according to my research, completion events are created prior to submission to CommandListCoreFamilyImmediate (which API is worker thread boundary) so "wait" will wait for them (in zeEventSychronize)

if you ask about failures in submitKernel path that may happen inside worker thread, then now I call abort() :) however this should be possible to be handled in the same way as failure in executing kernel on GPU - let's talk about this on person on Monday

[lslusarczyk]

BTW, let's keep discussion in PR in innersource