Add interface based constructor for LargeText

[das7pad]

• Part of Viewing large logs runs out of memory pipeline-graph-view-plugin#704

As suggested in #703 (review) and based on the guidance in jenkinsci/pipeline-graph-view-plugin#704 to avoid hacks in favor of upgrading the minimum Jenkins version for plugins, this PR is adding an interface based constructor for LargeText.

It will be used by the workflow-api plugin for a streaming based step log implementation.

(das7pad/jenkins-workflow-api-plugin@71f6322#diff-fa50e2c142db03c7b1d36cd1c8bf3be413f1e375ef7d0f28ca0e1889c49238d8R384-R392 -- With this PR merged and stapler upgraded in a Jenkins weekly, we can pull it into the plugin and avoid the hack.)

Testing done

#702 has added extensive tests for all the different LargeText source types. I've added another test for the interface based test.

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[timja]

Can you open the PR to workflow api please, you can use the incremental version in Jenkins core:
https://github.com/jenkinsci/stapler/pull/718/checks?check_run_id=50334233013

and then the Jenkins core dependency in workflow API, so we can see it working end 2 end.

[timja]

@jglick is this something you would like to take a look over?

[jglick]

@das7pad seems you are doing something in workflow-api-plugin; please file that as a draft PR, e.g. based on https://github.com/jenkinsci/jenkins/pull/11071/checks?check_run_id=50444111133

[jglick]

OK AFAICT