[components] Add dagster-dg to pyright env (#26519)

## Summary & Motivation

Was an oversight that this is not present.

## How I Tested These Changes

pyright

pyright/master/requirements.txt

@@ -52,6 +52,7 @@
 -e python_modules/libraries/dagster-deltalake/
 -e python_modules/libraries/dagster-deltalake-pandas/
 -e python_modules/libraries/dagster-deltalake-polars/
+-e python_modules/libraries/dagster-dg/
 -e python_modules/libraries/dagster-docker/
 -e python_modules/libraries/dagster-duckdb/
 -e python_modules/libraries/dagster-duckdb-pandas/