Release 4.0 tracker

[lresende]

Using this issue to track the must haves before we can start cutting a 4.0 release

• Migrate Elyra extensions to support JupyterLab 4.x #3201
• Update repository readme and documentation with JupyterLab v4 information #3145
• Run/fix UI and Server linting #3258
• update copyright to 2025 #3256
• Make generic pipeline work with airflow2x #3167
• Refactor pipeline implementation to use common pattern for file naming #3160
• Remove obsolete read_entry_data method from class ComponentCatalogConnector #3141

[caponetto]

@lresende I believe it'd be nice to have the PRs below (from ODH) cherry-picked for the release. The first one is an improvement to build the release artifacts (frontend) using the production scripts, and the other two are bug fixes. I can send a PR for each one of them. Please let me know if I can proceed.

EDIT: Cherry-picks:

ODH Elyra	Elyra
#50	#3269
#87	#3271
#88	#3270

[lresende]

@caponetto I tried to cherry-pick some of these with conflicts or other issues. Maybe it would be easier if you submitted a PR with some details on how to validate. We might also need to update some docs for the dev/prod builds.

[caponetto]

@lresende I have submitted the PRs. Please take a look at them when you have some time.

[lresende]

We should be ready for release after the rc5 released today.

[lresende]

https://github.com/elyra-ai/elyra/releases/tag/v4.0.0

[hadesto]

congrats on the new release!!