Add support for Ubuntu 23.04 (Lunar Lobster)

[rbhanda]

This issue is created to track progress for the work to enable Ubuntu 23.04 support for .NET 7.0 and .NET 6.0

Product and Test updates

• [All teams] Do a compatibility check for the product with the new OS
• [CoreCLR/CoreFX] Runtime / RID Support update
• [Infra] Ensure that the correct Docker images used by teams are built in the dotnet-buildtools-prereqs (if applicable)
• [Infra] Replace docker tags used in builds across repos and branches
• [CLI team] Update CI legs to latest updated Dockerfile
• [All teams] Update test infrastructure to support the new version
• [Acquisition] Add support within nightly repos
• [Acquisition] Deploy to master (GA) during next patch release cycle

Release team:

• Notify .NET Core teams regarding new OS release
• Update the supported OS content on GitHub and marketing sites.

Document updates:

• Add OS prerequisites to the dependencies document
• Update distro install page

[mthalman]

I've updated the checklist to remove publishing of official Docker images. For Ubuntu, we only publish official Docker images for LTS versions which 23.04 is not.

[MattGal]

@michellemcdaniel / @ChadNedzlek this isn't happening til approximately April. I get tagged on these for docker creation, FYI for your current epic.

[michellemcdaniel]

Thanks for letting us know. We may be fully migrated (should be?) by then, so hopefully we can bypass the "do it in 2 places" bit

[delanym]

We're three months into Lobster's nine month lifespan. I couldn't find a ticket for Kinetic Kudu. Perhaps you should just say you only support LTS distributions?