Post 1.11.0 release

[manuzhang]

This is to track issues we need to address immediately after 1.11.0 release @aihuaxu

• Remove Spark 3.4 in Iceberg 1.12 release #14121 @kevinjqliu
• Replace switch statement with switch expression #15176 or Core: Fix all ErrorProne warnings after Java 17 upgrade #15494 @mxm @pvary
• Flink: Update Flink release notes for 1.11.0 release #16170 @mxm

[pvary]

Also remove Flink 1.20 and add Flink 2.2, or even 2.3 if we are that late with the release

[mxm]

We might still merge #16170 before the 1.11.0 release, but good to track it here. Thanks @manuzhang!

[manuzhang]

@mxm I think it would be part of the release process but after create the tag.