Fix: Unable to Access parent JSON element from a nested array using the _parent. syntax FOUR-6990

Issue & Reproduction Steps

Unable to Access parent JSON element from a nested array using the _parent. syntax FOUR-6990

Expected behavior: Can access to values under _parent._parent

Actual behavior: Can not access to values under _parent._parent

[ ] I have pulled this code locally and tested it on my instance, along with any associated packages.
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[ ] This code includes a unit test or an E2E test that tests its functionality, or is covered by an existing test.
[ ] This solution fixes the bug reported in the original ticket.
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[ ] This solution does not implement any breaking changes that would invalidate documentation or cause existing Processes to fail.
[ ] This solution has been tested with enterprise packages that rely on its functionality and does not introduce bugs in those packages.
[ ] This code does not duplicate functionality that already exists in the framework or in ProcessMaker.
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