feat: Add optional Parent field to Device objects.

[eaton-coreymutter]

BREAKING CHANGE: Parent parameter added to edgex_add_device(), edgex_update_device().

Part of edgexfoundry/edgex-go#4769 implementation but does not close it on its own.

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PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break) Flagged - added "parent" parameter to two public functions
• I am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?) None already in repo
• I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• I have opened a PR for the related docs change (if not, why?) Docs (OpenAPI) to update are in edgex-go, will include with core-metadata PR

Testing Instructions

I tested using device-random in the examples, both against a core-metadata that supports the parent field (and creating a child device), and against an unmodified core-metadata (without the parent field set in the device yaml file). The devices created succesfully and persisted successfully.

New Dependency Instructions (If applicable)

[FelixTing]

LGTM

needs a little tweak in code style

[FelixTing]

LGTM