Respect strict_types during sccp function call evaluation

Similar to what we do with attributes, add a dummy call frame
on which we can set the strict_types flag.

Remove duplicate str_split check, fix test expectation

Fix handling of sccp exceptions

We should clear the exception *before* we destroy the execute_data.
Add a variation of the test that indirects through another file,
and would crash o

Fix handling of sccp exceptions

We should clear the exception *before* we destroy the execute_data.
Add a variation of the test that indirects through another file,
and would crash otherwise.

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