Stop loading vector properties - relational query pipeline

[roji]

See parent #37277 for the general feature design.

Once model and change tracking support is implemented in #37278, the query pipeline needs to be modified as follows:

1. The SQL we generate should not fetch vector columns (server-side query change).
2. The shaper must deal with the property not being fetched, and properly interact with the change tracker around this.

Note that this needs to happen for both relational and Cosmos.