HSA Finalizer: Add dumping of code object, ISA and executable to loader.
This is controlled by loader options -dump-all, -dump-isa, -dump-code, -dump-exec
The options can now also be set with env variable LOADER_OPTIONS_APPEND.
Added tests to finalizer_offline
Testing: smoke, dumping on hardware
Reviewed by: Konstantin Zhuravlyov
[git-p4: depot-paths = "//depot/stg/hsa/drivers/hsa/runtime/": change = 1255351]