NIFI-9514 NIFI-9515: Add UI support for Parameter Providers in Controller Services

[mtien-apache]

Thank you for submitting a contribution to Apache NiFi.

Please provide a short description of the PR here:

This PR adds a new Parameter Providers tab in the Controller Settings UI dialog. From the Parameter Providers tab, users can add and configure Parameter Providers to fetch external parameters. Parameter contexts created from a provider will be listed in Parameter Contexts, where the parameters will be in a read-only state.

• To test, you'll need to check out and rebase on top of PR 5369.
• Links to Jiras: NIFI-9514, NIFI-9515

In order to streamline the review of the contribution we ask you to ensure the following steps have been taken:

For all changes:

• [x] Is there a JIRA ticket associated with this PR? Is it referenced in the commit message?

• [x] Does your PR title start with NIFI-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.

• [x] Has your PR been rebased against the latest commit within the target branch (typically main)?

• [x] Is your initial contribution a single, squashed commit? Additional commits in response to PR reviewer feedback should be made on this branch and pushed to allow change tracking. Do not squash or use --force when pushing to allow for clean monitoring of changes.

For code changes:

• [ ] Have you ensured that the full suite of tests is executed via mvn -Pcontrib-check clean install at the root nifi folder?
• [ ] Have you written or updated unit tests to verify your changes?
• [x] Have you verified that the full build is successful on JDK 8?
• [ ] Have you verified that the full build is successful on JDK 11?
• [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• [ ] If applicable, have you updated the LICENSE file, including the main LICENSE file under nifi-assembly?
• [ ] If applicable, have you updated the NOTICE file, including the main NOTICE file found under nifi-assembly?
• [ ] If adding new Properties, have you added .displayName in addition to .name (programmatic access) for each of the new properties?

For documentation related changes:

• [ ] Have you ensured that format looks appropriate for the output in which it is rendered?

Note:

Please ensure that once the PR is submitted, you check GitHub Actions CI for build issues and submit an update to your PR as soon as possible.

[mcgilman]

Reviewing...

[mtien-apache]

Please do not merge yet. This is still a work in progress.

[mtien-apache]

This PR is now ready for review.

[mtien-apache]

@mcgilman Thanks for reviewing! I addressed all of your comments.

I've also hit the issue addressed in this PR [1]. Once this PR is in, I'll try running against https://github.com/apache/nifi/pull/6388.

For this issue, I also tested my PR against PR 6388 and it works as expected.

Will you review again?