Metadata Editor / fix error when saving with GeoNetwork 4.2.5+

[jahow]

Description

This PR fixes an issue where saving would fail with a 500 HTTP error with GeoNetwork versions of 4.2.5 and above.

This is because:

• this commit made the insert API only accept the XML
• the generated API client in GeoNetwork-UI was still handling the 3 previous content types (XML, JSON, url encoded)
• as such, the generated API client was sending the PUT request with a Content-Type: application/json header, which failed because this content type was not handled anymore in GeoNetwork API

Remaining to do:

• write an end-to-end test for saving a record
• run e2e tests against various versions of GN to avoid this problem in the future

Architectural changes

GN4 API client was regenerated

Quality Assurance Checklist

• Commit history is devoid of any merge commits and readable to facilitate reviews
• If new logic ⚙️ is introduced: unit tests were added
• If new user stories 🤏 are introduced: E2E tests were added
• If new UI components 🕹️ are introduced: corresponding stories in Storybook were created
• If breaking changes 🪚 are introduced: add the breaking change label
• If bugs 🐞 are fixed: add the backport <release branch> label
• The documentation website 📚 has received the love it deserves

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[github-actions]

Affected libs: data-access-gn4, api-metadata-converter, api-repository, feature-catalog, feature-record, feature-router, feature-search, feature-map, feature-dataviz, feature-editor, feature-auth, ui-search,
Affected apps: metadata-editor, metadata-converter, datahub, demo, webcomponents, map-viewer, search, datafeeder,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[github-actions]

📷 Screenshots are here!

[jahow]

This PR most likely fixes #935

[coveralls]

coverage: 83.508% (+0.4%) from 83.088%
when pulling 583c63f on me-fix-save-gn-425
into 613f731 on main.

[rcaplier]

LGTM !

I'm not very quite used with the githubwork workflow stuff so I trust you on that.

[jahow]

The E2E tests are still flaky, I'll try to improve them