libpldmresponder: Migrate to pldm_pdr_add_fru_record_set_check()

pldm_pdr_add_fru_record_set() is deprecated in libpldm as it used
assert() to communicate failure to the caller.
pldm_pdr_add_fru_record_set_check() instead returns a value indicating
success or failure.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I88ed90a03b15a949641788906495c9507a5a196b