Apply builder pattern to kernel launcher

[ZzEeKkAa]

Update kernel launcher builder to use builder pattern. Since the argument list is long we need modular way of providing those arguments to make code more readable and extendable.

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[diptorupd]

Few dead code that I noticed after your changes in parfor_lowerer.py

• _KernelArgs
• from numba_dpex.core.datamodel.models import dpex_data_model_manager as dpex_dmm

[diptorupd]

Nice clean up. Makes the code readable and reduces redundancies.

[diptorupd]

There is a place in parfor_lowerer.py where the same hard coing is done. It will be goo to move the global to dpctl_iface and use it from there.

[ZzEeKkAa]

I guess I've already removed it from parfor_lowerer. This constant is beeing used there through the set_range() call.

[ZzEeKkAa]

There is an issue in this change. Before this change parfor_lowerer was using from numba_dpex.core.datamodel.models import dpex_data_model_manager as dpex_dmm data model manager, which is the same as kernel data model manager, but now it uses data model manager from context which is equal to numba's data model manager. It is okay as long as number of arguments for USMNdArray and DpnpNdArray are the same, but I would introduce KernelLaunchIRBuilder.kernel_data_model_manager attribute to store the right dmm on instance creation for use with methods that flattened arguments.