feat: Add optional "parent" field to Device objects.

[eaton-coreymutter]

Related to issue edgexfoundry/edgex-go#4769 but does not close it, other PRs to come.

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PR Checklist

Please check if your PR fulfills the following requirements:

• [ x ] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• [ x ] I am not introducing a new dependency (add notes below if you are)
• [ x ] I have added unit tests for the new feature or bug fix (if not, why?)
• [ x ] 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 to update are in edgex-go (the OpenAPIs), will update those in another PR for this issue

Testing Instructions

I built core-metadata, core-command, device-virtual with these changes, verified I could set the "parent" field via PATCH or via inclusion in YAML device definition file, the field can be set to empty via PATCH with empty-string value, and the field persists across restarts of core-metadata.

New Dependency Instructions (If applicable)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.23529% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 64.25%. Comparing base (7c7fc6d) to head (1b5d019).

Files	Patch %	Lines
clients/http/device.go	83.33%	1 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #887      +/-   ##
==========================================
+ Coverage   62.32%   64.25%   +1.93%     
==========================================
  Files          93       93              
  Lines        3679     3696      +17     
==========================================
+ Hits         2293     2375      +82     
+ Misses       1164     1100      -64     
+ Partials      222      221       -1     

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[AnilChoudhury-Eaton]

Looks good.

[cloudxxx8]

LGTM

[cloudxxx8]

@eaton-coreymutter the device client mock should be regenerated, or we will get the unit test failure in other services
edgexfoundry/device-sdk-go#1575 (review)

[cloudxxx8]

[2024-04-23T04:16:06.573Z] --- FAIL: TestAddReadingTags (0.00s)
[2024-04-23T04:16:06.573Z] panic: interface conversion: *mocks.DeviceClient is not interfaces.DeviceClient: missing method AllDevicesWithChildren [recovered]
[2024-04-23T04:16:06.573Z] panic: interface conversion: *mocks.DeviceClient is not interfaces.DeviceClient: missing method AllDevicesWithChildren

fixed in #889

[eaton-coreymutter]

@eaton-coreymutter the device client mock should be regenerated, or we will get the unit test failure in other services edgexfoundry/device-sdk-go#1575 (review)

Sorry about that - I regenerated it once but forgot to do it again after changing the signature.

[cloudxxx8]

no problem