interp: make ptrtoint size mismatch a recoverable error

Go 1.26 changed Darwin's rawSyscall/Syscall from assembly stubs to Go
wrappers that call variadic rawsyscalln/syscalln. When the interp tries
to evaluate syscall.init() at compile time (which calls Getrlimit →
rawSyscall → rawsyscalln), it encounters a ptrtoint of a function
pointer and fails with 'ptrtoint integer size does not equal pointer
size'.

Make this a recoverable error so the interp reverts the init
interpretation and defers it to runtime, matching the behavior for other
uninterpretable init functions.

interp/errors.go

@@ -29,7 +29,7 @@ var errInvalidPtrToIntSize = errors.New("interp: ptrtoint integer size does not
 func isRecoverableError(err error) bool {
 	return err == errIntegerAsPointer || err == errUnsupportedInst ||
 		err == errUnsupportedRuntimeInst || err == errMapAlreadyCreated ||
-		err == errLoopUnrolled
+		err == errLoopUnrolled || err == errInvalidPtrToIntSize
 }
 
 // ErrorLine is one line in a traceback. The position may be missing.