Summary:
We are introducing a new flag `enable_tablet_split_of_replication_slot_streamed_tables` to enable/disable automatic tablet splitting for tables that are part of a replication slot's stream metadata. The default value is set to false in order to disable splitting by default.

Note: This flag is only applicable for CDC streams with replication slots. For unit tests, we have set the flag to true to allow automatic tablet splitting.
Jira: DB-14308

Test Plan:
./yb_build.sh --cxx-test integration-tests_cdcsdk_tablet_split-test --gtest_filter CDCSDKTabletSplitTest.TestTabletSplitDisabledForTablesWithReplicationSlot
Manually tested the following scenario where user can have both type of streams on separate databases:
1. Create two databases - DB1 & DB2.
2. Create table t1 in both DB1 & DB2.
3. Create a regular CDC stream without replication on DB1. Create a replication slot on DB2.
4. Manually split tablet of table t1 present in DB1. Confirmed its allowed to split.
5. Manually split tablet of table t1 present in DB2. Confirmed we receive an error stating splitting is not allowed with replication slot.

Reviewers: xCluster, hsunder, skumar, sumukh.phalgaonkar

Reviewed By: skumar

Subscribers: ybase

Tags: #jenkins-ready

Differential Revision: https://phorge.dev.yugabyte.com/D40473