Draft: Adds Flags for Writing/Reading Codegen Pragmas
Adds two flags, -fwrite-codegen-pragmas
and -fread-codegen-pragmas
,
which ensure that codegen pragmas (currently only CAF status and
LambdaFormInfo) are written to and read from interface files respectively.
I have verified that the flags behave as expected but am unsure of how to add a test for it.
Implements #17931