[FEATURE] Add the public api to context.data_source and context.data_source.get #16696

Job	Run time
ci-is-on-main-repo	1s
ci-does-not-run-on-draft-pull-requests	0s
static-analysis	3m 47s
unit-tests (ubuntu-latest, 3.8)	2m 18s
unit-tests (ubuntu-latest, 3.9)	2m 18s
unit-tests (ubuntu-latest, 3.10)	2m 17s
unit-tests (ubuntu-latest, 3.11)	2m 22s
unit-tests (ubuntu-latest, 3.12)	2m 45s
py38-min-versions	3s
doc-checks	4s
cloud-tests	3s
marker-tests (athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds, 3.8)	2s
py310-min-versions	2s
marker-tests (aws_deps, 3.8)	1s
airflow-min-versions	3s
py311-min-versions	2s
marker-tests (aws_deps, 3.12)	1s
marker-tests (big, 3.8)	1s
py312-min-versions	3s
py39-min-versions	1s
marker-tests (big, 3.12)	1s
import_gx (3.8)	6s
pydantic-v1	3s
marker-tests (databricks, 3.8)	1s
marker-tests (filesystem, 3.8)	1s
import_gx (3.11)	1s
marker-tests (filesystem, 3.12)	1s
marker-tests (mssql, 3.8)	1s
marker-tests (mssql, 3.12)	1s
marker-tests (mysql, 3.8)	1s
marker-tests (mysql, 3.12)	1s
marker-tests (postgresql, 3.8)	1s
marker-tests (postgresql, 3.12)	2s
marker-tests (snowflake, 3.8)	1s
marker-tests (spark, 3.8)	1s
marker-tests (spark, 3.12)	1s
marker-tests (trino, 3.8)	1s
marker-tests (trino, 3.12)	1s
docs-snippets	1s
docs-build	1s
Build and publish Python distributions to PyPI	1s
notify_on_release	1s
notify_on_failure	1s
	16m 45s

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