HDDS-16193. Clean up ScmClient

[echonesis]

What changes were proposed in this pull request?

ScmClient is an internal interface that contains several deprecated or unused methods.

This PR:

• removes the deprecated createContainer overload that accepts replication type and factor separately;
• removes unused container creation, deletion, reading, and size methods;
• removes the corresponding implementations and unused configuration fields from ContainerOperationClient;
• updates existing test callers to use ReplicationConfig explicitly.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-16193

How was this patch tested?

Local Test

# The Non-HA integration test suite was run with a clean reactor build
mvn -pl :ozone-integration-test -am \
    clean test \
    -Dtest=TestOzoneIntegrationNonHA \
    -Dsurefire.failIfNoSpecifiedTests=false -DskipShade -DskipRecon -DskipDocs -Dscan=false

# The updated container balancer test was also run directly
mvn -pl :ozone-integration-test test \
    -Dtest=TestContainerBalancerOperations \
    -DskipShade -DskipRecon -DskipDocs -Dscan=false

GitHub Actions CI: https://github.com/echonesis/ozone/actions/runs/32006995899

Generated-by: Codex (GPT-5)

[szetszwo]

+1 the change looks good.