Enable APML RAS Manager Initialization

[aasboddu]

• Added initialization for APML RAS Manager.
• Included conditional compilation for APML support.
• Added a placeholder error log for PLDM RAS capabilities, indicating that they are yet to be enabled.
• The init function repeatedly attempts to get the BMC RAS OOB configuration until successful.
• The function initializes the platform with the block ID's that needs to be harvested during a crashdump and sets up a D-Bus match to monitor watchdog state changes to monitor BIOS post complete.
• It reads CPU IDs for all CPUs and logs errors on failure.
• The function also handles BIOS post-completion by configuring PCIE OOB settings and enabling PCIE error thresholds based on watchdog timer changes.
• It also clears SbrmiAlertMask register so APML_ALERT_L will be asserted during a syncflood in the system.
• The commit has oem_cper.h providing the outline of file format for both runtime and crashdump CPER records.
• Overall , this commit provides all the necessary preps needed to enable the crashdump flow.

[abinayaddhandapani]

There is still open discussion to use libcper library or copy the contents of libcper/Cper.h to amd-ras repo is still under discussion.

@supven01 Can you please provide your inputs