Implement Sub-Partitioning and Detach Partition

Continuation of ticket and implement the following enhancement:

• Allow definition of second partition key column for sub-partition of table.

• Add IsAttached flag to AD_TablePartition and support detach/attach of partition.

Test Case for sub-partition:

1. Checked Partition flag for table AD_ChangeLog.

2. Navigate to column AD_Client_ID, checked Partition Key and select List as the partitioning method. Partition sequence default to 10.

3. Navigate to column Created, checked Partition Key, select Range as partitioning method and enter 6 month for partition range interval. Partition sequence default to 20.

4. Run Create/Update Partition process.

5. Table partition tab will be updated with primary partition created for column AD_Client_ID and sub-partition created for column Created.