[11.x] Support Optional Dimensions for vector Column Type

[akr4m]

The vector method to support adding a new vector column without specifying dimensions. The changes include:

• Modified the vector method to handle cases where the $dimensions parameter is not provided or is null.
• Ensures that the code gracefully defaults to an empty options array when dimensions are not defined, allowing for flexibility when creating vector columns.

These changes provide more flexibility in defining vector columns, making the dimensions parameter truly optional.