Support get dataset citation for deaccessioned datasets via API

[GPortas]

What this PR does / why we need it:

We need to extend the API to obtain dataset citation for a deaccessioned dataset, as the SPA needs it for displaying the citation for a deaccessioned dataset.

The getDatasetVersionCitation (/api/datasets/{id}/versions/{versionId}/citation) endpoint now accepts a new boolean optional query parameter "includeDeaccessioned", which, if enabled, causes the endpoint to consider deaccessioned versions when searching for versions to obtain the citation.

Which issue(s) this PR closes:

• Closes [Spike - API] Support get dataset citation for deaccessioned datasets #10104

Suggestions on how to test this:

First, deaccession a published dataset from the UI or by using the API.

Next, call the getDatasetVersionCitation endpoint with the new query parameter:

curl -H "Accept:application/json" "$SERVER_URL/api/datasets/:persistentId/versions/$VERSION/{version}/citation?persistentId=$PERSISTENT_IDENTIFIER&includeDeaccessioned=true"

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No

Is there a release notes update needed for this change?:

Yes

[coveralls]

coverage: 20.003% (+0.007%) from 19.996%
when pulling 233da54 on 10104-get-dataset-citation-deaccessioned
into 9186b06 on develop.

[pdurbin]

Looks good. Tests are passing and I played around with it locally. The only change I added was to update the (new) API changelog.

I plan to merge this soon.

[github-actions]

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