Fixes #9430 - Make sure initial data is passed as array for DynamicModelChoiceFields

[kkthxbye-code]

Fixes: #9430

When pre-filling a MultiObjectVar for custom script execution passing a single pk above 9 would not work. Passing multiple values like: ?devices=1&device=99 works.

The error occurs in line 95 here:

netbox/netbox/utilities/forms/fields/dynamic.py

Lines 88 to 100 in 2e5a5f7

	# Modify the QuerySet of the field before we return it. Limit choices to any data already bound: Options
	# will be populated on-demand via the APISelect widget.
	data = bound_field.value()
	if data:
	field_name = getattr(self, 'to_field_name') or 'pk'
	filter = self.filter(field_name=field_name)
	try:
	self.queryset = filter.filter(self.queryset, data)
	except (TypeError, ValueError):
	# Catch any error caused by invalid initial data passed from the user
	self.queryset = self.queryset.none()
	else:
	self.queryset = self.queryset.none()

When passed a two or more digit number in a string, the value seems to get split into a string, so instead of looking up pk 123, it looks up pk 1, 2 and 3.

I'm not sure exactly what's going on here so there might be a better place to fix the issue, please let me know and I'll change it.

[jsenecal]

Good catch! I was struggling to find where the issue was occurring.

Could you add a test for that edge-case for good measure?