Add object array abstraction to ipc4_module_init_ext_init and use it to pass stack and heap size for DP modules

[jsarha]

Extend the existing struct ipc4_module_init_ext_init payload with an abstract object array, and use the object array to pass DP module memory configuration e.g. stack and heap size. The PR contains decoding of the payload and extraction of stack and heap size properties, but no actual functionality for applying the memory configuration for the module. The decoding also lacks the decoding of rtos_domain and gna_used flags and payload.