feat: CommandRunner enters degraded states when it processes command with higher version than it supports

[stevenpyzhang]

Description

Stacks on top of
#6012
#6031

Review only last commit
Prevents the server from processing a command from a newer version than it. I've repurposed the Version flag added #5104 as it wouldn't find any use currently since we can't break backwards compatibility currently.

Testing done

Unit test
Manual test:

• Start with fresh command topic
• Start up server on this branch
• Issue a bunch of statements to the command topic (CS/CSAS)
• Stopped the server
• Created a new branch and increment the VERSION in Command.java which is the ExpectedVersion
• Start server and issue DDL statements
• Switched to this branch and start up server
• Verify with JConsole the CommandRunnerStatus is degraded
• Verify all previous commands before the incompatible command are executed and the queries are started
• Verify CommandRunner thread is shut down by trying to issue more DDL statements to server

create stream steven as select * from test;
DDL command failed to be sent to command topic, the CommandRunner is in a DEGRADED state currently.
This can happen when it encounters an incompatible command when processing the command topic.
Check the server logs for more details.

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")

[rodesai]

LGTM