ArmCcaLib provides helper functions for detecting Realm execution state
and caching Realm IPA width. These helpers build on the architectural Arm
CCA RSI library and are not specific to ArmVirtPkg.
Therefore, move ArmCcaLib, ArmCcaLibNull, their public header, and related
GUID declarations to MdeModulePkg. Update ArmVirtPkg library mappings and
consumers to use the new MdeModulePkg library instances.
Continuous-integration-options: PatchCheck.ignore-multi-package
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
