NIFI-16270 Added maximum in-memory FlowFile content size to VersionedProcessGroup

[markap14]

Summary

NIFI-16270 Adds statelessFlowFileContentInMemoryMax to VersionedProcessGroup so a Stateless Process Group can persist a data-size limit for buffering FlowFile content in memory. This is the API change for NIFI-16269; the framework and UI follow in NIFI-16271.

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