DynamicTablesPkg: Arm ACPI GTDT Generator

DynamicTablesPkg: Arm ACPI GTDT Generator

The GTDT generator uses the configuration manager protocol to
obtain information about the architectural and platform timers
available on the platform and generates the ACPI GTDT table.
This table data is then used by the Table Manager to install
the GTDT table.

The Table Manager then invokes the generator interface to free
any resources allocated by the GTDT table generator.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Alexei Fedorov <alexei.fedorov@arm.com>