NIFI-14585 Remove Selenium Tests from Registry Web UI

[exceptionfactory]

Summary

NIFI-14585 Removes Selenium tests from the Registry Web UI module along with the associated Maven profile and dependencies.

These tests are not run in any standard workflows, and have not been maintained. Recent dependency issues such as webdrivermanager highlighted in #9949 highlighted the need to remove these tests.

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

• Pull Request based on current revision of the main branch
• Pull Request refers to a feature branch with one commit containing changes

Verification

Please indicate the verification steps performed prior to pull request creation.

Build

• Build completed using mvn clean install -P contrib-check
  • JDK 21

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files

[pvillard31]

Great, nice to see those dependencies removed. Thanks @exceptionfactory, will merge after all checks complete.