NIFI-12294 Standardize NAR Entry Loading

[exceptionfactory]

Summary

NIFI-12294 Updates the NarUnpacker to standardize loading of entries for NAR files, reducing duplicative naming normalization. Additional changes include updating the associated test class to reduce unnecessary parameter passing and method calls.

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

[markap14]

Thanks for tackling that, @exceptionfactory. Looks like all tests (including system tests) are passing. Was able to startup with an existing work/ directory, and restart after deleting work/ directory and all appears to work as intended. Thanks for improving the code there! +1 will merge