[chore] Added tests to verify linter not being stuck in the infinite loop (#3225)

Bug was fixed in v0.46.0

- #3000
- #3027

See:
- #2976

`default-format-changed-in-dbr8` and `sql-parse-error` are ignored for
LSP plugin output.

Author: nfx

tests/unit/source_code/samples/functional/es-1285042.py

@@ -0,0 +1,14 @@
+import pyspark.sql.functions as F
+
+# ucx[default-format-changed-in-dbr8:+1:17:+1:41] The default format changed in Databricks Runtime 8.0, from Parquet to Delta
+churn_features = spark.table("something")
+churn_features = (churn_features.withColumn("random", F.rand(seed=42)).withColumn("split",F.when(F.col("random") < train_ratio, "train").when(F.col("random") < train_ratio + val_ratio, "validate").otherwise("test")).drop("random"))
+
+# ucx[default-format-changed-in-dbr8:+1:1:+1:109] The default format changed in Databricks Runtime 8.0, from Parquet to Delta
+(churn_features.write.mode("overwrite").option("overwriteSchema", "true").saveAsTable("mlops_churn_training"))
+
+# ucx[default-format-changed-in-dbr8:+1:21:+1:74] The default format changed in Databricks Runtime 8.0, from Parquet to Delta
+sdf_system_columns = spark.read.table("system.information_schema.columns")
+
+# ucx[sql-parse-error:+1:14:+1:140] SQL expression is not supported yet: SELECT 1 AS col1, 2 AS col2, 3 AS col3 FROM {sdf_system_columns} LIMIT 5
+sdf_example = spark.sql("SELECT 1 AS col1, 2 AS col2, 3 AS col3 FROM {sdf_system_columns} LIMIT 5", sdf_system_columns = sdf_system_columns)