[Improvement]: Upgrade to iceberg 1.6.0

[czy006]

Search before asking

• [X] I have searched in the issues and found no similar issues.

What would you like to be improved?

Upgrade to iceberg 1.6.0 This is the last version support jdk8

How should we improve?

• upgrade flink mixed formate base flink version 1.18
• upgrade iceberg dependency 1.6.x

Are you willing to submit PR?

• [X] Yes I am willing to submit a PR!

Subtasks

• [ ] #1669
• [ ] #2905

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[czy006]

discuss e-mail https ://lists.apache.org/thread/1crbstg7prjxz8xokd7dtj1o5mgv1034