Spanner - Error while having the Interleaved table having only one primary key which is same as the parent table

**Describe the bug**
com.google.cloud.spring.data.spanner.core.mapping.SpannerDataException: A child table (tablename) must contain the primary key columns of its parent (tablename) in the same order starting the first column with additional key columns after.

If you have Interleave table that has only the same primary key as the Parent and doesnt have any additional key, then getting this Exception

Note: I have business reason to logically have another table to store separate information from ParentTable

Sample

```
public class Parent {

@PrimaryKey(keyOrder = 1)
@Column(name = "ParentId", nullable = false)
private String ParentId;

@Column(name = "details", nullable = false)
private String details

@Interleaved
private List parentLogical;

}

public class ParentLogical {

@PrimaryKey(keyOrder = 1)
@Column(name = "ParentId", nullable = false)
private String ParentId;

@Column(name = "associatedlogicalName", nullable = false)
private String associatedlogicalName

```
}

No source files or tests are named. Start by locating the Spanner mapping validation that raises this exception and reproduce it with the Parent and ParentLogical entities from the issue; done means an interleaved child whose primary key contains only the parent's key is accepted, with regression coverage for that case.

Written by the indexing model from the issue text.