DynamicTablesPkg: AML code generation for a ResourceTemplate

DynamicTablesPkg: AML code generation for a ResourceTemplate

ASL provides a ResourceTemplate macro that creates a Buffer in which
resource descriptor macros can be listed. The ResourceTemplate macro
automatically generates an End descriptor and calculates the checksum
for the resource template.

Therefore, add AmlCodeGenResourceTemplate() to generate AML code for
the ResourceTemplate() macro. This function generates a Buffer node
with an EndTag resource data descriptor, which is similar to the ASL
ResourceTemplate() macro.

Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>