DynamicTablesPkg: DynamicTableManagerDxe: Added check for installed tables

DynamicTablesPkg: DynamicTableManagerDxe: Added check for installed tables

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3997

This change added an extra step to allow check for installed ACPI tables.

For FADT, MADT, GTDT, DSDT, DBG2 and SPCR tables, either pre-installed or
supplied through AcpiTableInfo can be accepted.

An extra check for FADT ACPI table existence during installation step is
also added.

Cc: Sami Mujawar <Sami.Mujawar@arm.com>
Cc: Alexei Fedorov <Alexei.Fedorov@arm.com>
Co-authored-by: Joe Lopez <joelopez@microsoft.com>
Signed-off-by: Kun Qin <kuqin12@gmail.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@Arm.com>
Tested-by: Sami Mujawar <sami.mujawar@arm.com>