Dynamically load oauth-related libraries (backport #11448)

[mergify[bot]]

Proposed Changes

It addresses one issue raised and two more issues found but not raised:

• https://github.com/rabbitmq/rabbitmq-server/issues/11421
• the logged in user's name should only be a hyperlink to the user's record when the user is an administrator and it has been authenticated with the internal backend. In other words, if the user was authenticated with oauth or ldap or http, there is no internal record of the user hence the username should not be rendered as a hyperlink.
• disable browser login dialog-box and instead always redirect the user to the login html page when either the credentials are wrong or user is not authorized or session has expired

Types of Changes

What types of changes does your code introduce to this project? Put an x in the boxes that apply

• [X] Bug fix (non-breaking change which fixes issue #NNNN)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause an observable behavior change in existing systems)
• [ ] Documentation improvements (corrections, new content, etc)
• [ ] Cosmetic change (whitespace, formatting, etc)
• [ ] Build system and/or CI

---

This is an automatic backport of pull request #11448 done by Mergify.

[mergify[bot]]

Cherry-pick of ccb0059cd44e5578de9cd602df6dd456813f62a3 has failed:

On branch mergify/bp/v3.13.x/pr-11448
Your branch is up to date with 'origin/v3.13.x'.

You are currently cherry-picking commit ccb0059cd4.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
    modified:   deps/rabbitmq_management/priv/www/index.html
    modified:   deps/rabbitmq_management/priv/www/js/global.js
    modified:   deps/rabbitmq_management/priv/www/js/main.js
    modified:   deps/rabbitmq_management/priv/www/js/oidc-oauth/helper.js
    modified:   deps/rabbitmq_management/priv/www/js/oidc-oauth/login-callback.html
    modified:   deps/rabbitmq_management/priv/www/js/oidc-oauth/logout-callback.html
    modified:   deps/rabbitmq_management/priv/www/js/oidc-oauth/oidc-client-ts.js
    modified:   deps/rabbitmq_management/selenium/bin/components/devkeycloak
    modified:   deps/rabbitmq_management/selenium/bin/components/prodkeycloak
    modified:   deps/rabbitmq_management/selenium/full-suite-management-ui
    modified:   deps/rabbitmq_management/selenium/package.json
    new file:   deps/rabbitmq_management/selenium/suites/authnz-mgt/basic-auth-with-mgt-prefix.sh
    modified:   deps/rabbitmq_management/selenium/test/basic-auth/imports/users.json
    modified:   deps/rabbitmq_management/selenium/test/basic-auth/rabbitmq.conf
    new file:   deps/rabbitmq_management/selenium/test/basic-auth/rabbitmq.mgt-prefix.conf
    new file:   deps/rabbitmq_management/selenium/test/basic-auth/session-expired.js
    new file:   deps/rabbitmq_management/selenium/test/basic-auth/unauthorized.js
    modified:   deps/rabbitmq_management/selenium/test/oauth/imports/users.json
    new file:   deps/rabbitmq_management/selenium/test/oauth/with-basic-auth/unauthorized.js
    modified:   deps/rabbitmq_management/selenium/test/oauth/with-sp-initiated/unauthorized.js
    modified:   deps/rabbitmq_management/selenium/test/pageobjects/BasePage.js
    modified:   deps/rabbitmq_management/selenium/test/pageobjects/LoginPage.js
    modified:   deps/rabbitmq_management/test/rabbit_mgmt_http_SUITE.erl
    modified:   deps/rabbitmq_management_agent/src/rabbit_mgmt_format.erl
    modified:   deps/rabbitmq_web_dispatch/src/rabbit_web_dispatch_access_control.erl

Unmerged paths:
  (use "git add <file>..." to mark resolution)
    both modified:   deps/rabbitmq_management/src/rabbit_mgmt_oauth_bootstrap.erl

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally