Fix the get datasource issue with no run id

[ddl-joyce-zhao]

Description

Fix the wrong default domino run id when getting the data source.

This was introduced when fixing the build issue when generating the client using a particular version of open api generator. Fortunately, the final generated code doesn't require a default value to be present to pass the build.

Related Issue

https://dominodatalab.atlassian.net/browse/DOM-57725

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've read the CONTRIBUTING.md guide.
• I've updated the code style using make codestyle.
• I've written tests for all new methods and classes that I created.
• I've written the docstring in Google format for all the methods and classes that I used.

[github-actions]

✅ Result of Pytest Coverage

---------- coverage: platform linux, python 3.10.14-final-0 ----------

Name	Stmts	Miss	Cover
domino_data/init.py	7	2	71%
domino_data/_feature_store/init.py	0	0	100%
domino_data/_feature_store/client.py	43	3	93%
domino_data/_feature_store/exceptions.py	9	0	100%
domino_data/_feature_store/git.py	43	1	98%
domino_data/_feature_store/logging.py	7	0	100%
domino_data/_feature_store/run.py	16	16	0%
domino_data/_feature_store/sync.py	98	9	91%
domino_data/auth.py	100	14	86%
domino_data/configuration_gen.py	232	0	100%
domino_data/data_sources.py	290	24	92%
domino_data/logging.py	10	0	100%
domino_data/meta.py	22	0	100%
domino_data/training_sets/init.py	0	0	100%
domino_data/training_sets/client.py	135	10	93%
domino_data/training_sets/model.py	42	0	100%
domino_data/transfer.py	37	0	100%
domino_data/vectordb.py	23	4	83%
TOTAL	1114	83	93%

~ 67 passed in 14.78s ~