Use sqlalchemy version in sqlalchemy commenter instead of opentelemetry library version

The SqlAlchemy commenter is currently using the library version in the comment it emits, e.g.:

```
{
  'db_driver': 'psycopg2', 
  'db_framework': 'sqlalchemy:0.45b0'
}
```

We should instead be using the sqlalchemy version here, as SqlCommenter did before

Author: nicknicolini

instrumentation/opentelemetry-instrumentation-sqlalchemy/src/opentelemetry/instrumentation/sqlalchemy/engine.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 import os
 import re
+import sqlalchemy
 import weakref
 
 from sqlalchemy.event import (  # pylint: disable=no-name-in-module
@@ -227,7 +228,7 @@ def _before_cur_exec(
                 commenter_data = {
                     "db_driver": conn.engine.driver,
                     # Driver/framework centric information.
-                    "db_framework": f"sqlalchemy:{__version__}",
+                    "db_framework": f"sqlalchemy:{sqlalchemy.__version__}",
                 }
 
                 if self.commenter_options.get("opentelemetry_values", True):