Create API Endpoint: List File Versions

[ekraffmiller]

For the SPA, we need this API endpoint to implement the File Page: Versions Tab. This endpoint should return all details necessary to populate the Versions Tab, for example:

Note that there is an open PR that fixes an issue with the summary of version differences, here: #11145.
When implementing this feature, review the comments in the PR.

[GPortas]

Tentative size. Feel free to resize based on complexity.

[stevenwinship]

@ekraffmiller @GPortas @landreev
Question on what to do for files of a harvested dataset:

current code does a redirect to the originalSourceURL
FacesContext.getCurrentInstance().getExternalContext().redirect(originalSourceURL);

Should this API somehow retrieve this information or return the originalSourceURL so the new UI can get it?
Or is there enough information in our db to fulfill the request?

[stevenwinship]

@ekraffmiller @GPortas
A couple questions on file differences (file-versions.xhtml):

Question 1:
In the ui code the flags are converted to strings from the bundle. Do you want the same functionality or should the api return the bundled string?
<h:outputText value=" #{item.added}" rendered="#{item.added > 0 and item.multiple}" escape="false"/>
<h:outputText value=" #{bundle['file.versionDifferences.actionAdded']}" rendered="#{item.added > 0}" escape="false"/>

"File Metadata": {
                        "name": "File Name",
                        "added": 0,
                        "changed": 1,
                        "deleted": 0,
                        "replaced": 0
                    }

or

"File Metadata": {
                        "name": "File Name",
                        "action": "Changed",
                        "added": 0,
                        "changed": 1,
                        "deleted": 0,
                        "replaced": 0
                    }

Question 2:
For a new file the group summary the name is empty
<ui:fragment rendered="#{!empty groupSummary.name }">
This is an issue for the json returned in the api as the node can't/shouldn't be an empty string. One suggestion is to default it to "null" or "new". Another would be to not include the block. How would you like it returned?

"fileDifferenceGroupSummary": [
                {
                    "": {
                        "name": "File",
                        "added": 1,
                        "changed": 0,
                        "deleted": 0,
                        "replaced": 0
                    }
                }
            ]