Fix switch case warning related unconditional break, return or throw statement.

[anukalp2804]

Summary

This PR resolves SonarCloud rule java:S128, switch cases should end with an unconditional break, return or throw statement. For that we have done some changes like :

• Added break statements where execution could fall through to the next case
• Removed unnecessary {} blocks from cases that already had unconditional return statements
• Added {} blocks in a few places to make the case scope clearer for static analysis tools

Addressed : #17594
This PR has:

• been self-reviewed.
• been built locally with mvn spotless:apply.
• been built locally with mvn clean package -DskipTests.
• been built locally with mvn -pl iotdb-core -am test -DskipTests.

Resolves : https://sonarcloud.io/project/issues?impactSeverities=BLOCKER&issueStatuses=OPEN%2CCONFIRMED&id=apache_iotdb
End this switch case with an unconditional break, return or throw statement.

[JackieTien97]

@CRZbulabula @Caideyipi plz review related classes

[CRZbulabula]

LGTM

[HTHou]

There are some tests failed, please check them.

[anukalp2804]

I updated the code by removing the added "break" statements and using "// fall through" comments for the intentional fall-through cases.

These cases appear to be designed to continue execution into the subsequent cases, so adding "break" may be change the original behavior. The "// fall through" comments help clarify that the behavior is intentional and also resolve warnings.

Please review and let me know if any changes are needed from my side.

Thank you