Add Field (Column) Selection to the Terraform provider

[nataliekwong]

Currently, fieldSelectionEnabled is not exposed to the Terraform provider.

Branched from this issue: #35798

[kev-datams]

We would love to use this new capability 🙏

[jonseymour]

You can set it in the terraform provider now by adding selected_fields to each stream

For example:

        "selected_fields": [
          {
            "field_path": ["id"]
          },
          {
            "field_path": ["updated_at"]
          },
          {
            "field_path": ["email"]
          }
        ],

You do need to include the primary_key and cursor_fields in the list of selected fields.

The most glaring omission, however, is that neither the terraform provider nor the underlying SDK/API supports extracting the list of selected fields in a stream. This makes round-tripping impossible with the API alone and cumbersome otherwise,

See also: #45455