Upgrade to angular v18

[AAwouters]

References

• Fixes Upgrade to Angular 18 #3304

This branch continues on the work of #3506 which makes it look like this PR contains a lot more commits than it actually does. This compare view shows only the commits that belong to this PR.

Description

Updates Angular to version 18.
Dependencies related to Angular are also updated.

Instructions for Reviewers

This PR does not include any new functionality. Test DSpace as you usually would.

Checklist

• My PR is created against the main branch of code (unless it is a backport or is fixing an issue specific to an older branch).
• My PR is small in size (e.g. less than 1,000 lines of code, not including comments & specs/tests), or I have provided reasons as to why that's not possible.
• My PR passes ESLint validation using npm run lint
• My PR doesn't introduce circular dependencies (verified via npm run check-circ-deps)
• My PR includes TypeDoc comments for all new (or modified) public methods and classes. It also includes TypeDoc for large or complex private methods.
• My PR passes all specs/tests and includes new/updated specs or tests based on the Code Testing Guide.
• My PR aligns with Accessibility guidelines if it makes changes to the user interface.
• My PR uses i18n (internationalization) keys instead of hardcoded English text, to allow for translations.
• My PR includes details on how to test it. I've provided clear instructions to reviewers on how to successfully test this fix or feature.
• If my PR includes new libraries/dependencies (in package.json), I've made sure their licenses align with the DSpace BSD License based on the Licensing of Contributions documentation.
• If my PR includes new features or configurations, I've provided basic technical documentation in the PR itself.
• If my PR fixes an issue ticket, I've linked them together.

[github-actions]

Hi @AAwouters,
Conflicts have been detected against the base branch.
Please resolve these conflicts as soon as you can. Thanks!