exekall: Handle PEP 604 annotation
exekall: Handle PEP 604 annotation

PEP 604 annotation such as "int | None" raise a TypeError on older
versions of Python. Ignore such annotation by re-raising the appropriate
exception.

credp/lisa,ARM-software/lisa,credp/lisa,credp/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa,ARM-software/lisa