vmware_object_custom_attributes_info: Support the global type of custom attribute (#1541)

vmware_object_custom_attributes_info: Support the global type of custom attribute

SUMMARY
Fix the bug that occurs the error if the custom attribute is the global type.
fixes: #1477
ISSUE TYPE

Bugfix Pull Request

COMPONENT NAME
changelogs/fragments/1541-vmware_object_custom_attributes_info.yml
plugins/modules/vmware_object_custom_attributes_info.py
tests/integration/targets/vmware_object_custom_attributes_info/tasks/main.yml
tests/integration/targets/vmware_object_custom_attributes_info/tasks/pre.yml
tests/integration/targets/vmware_object_custom_attributes_info/tasks/vmware_object_custom_attributes_info_tests.yml
tests/integration/targets/vmware_object_custom_attributes_info/tasks/cleanup.yml
ADDITIONAL INFORMATION
tested on VCSA 7.0

Reviewed-by: sky-joker <sky.jokerxx@gmail.com>
Reviewed-by: Mario Lenz <m@riolenz.de>