Ignore DBTITLE magic comments in .py "notebooks" (#1609)

## Changes
Ignore DBTITLE magic comments in `.py` "notebooks"


Fixes #1604

## Tests

Updated e2e tests

Author: ilia-db

packages/databricks-vscode/resources/python/00-databricks-init.py

@@ -338,10 +338,8 @@ def parse_line_for_databricks_magics(lines: List[str]):
         if len(lines) == 0:
             return lines
 
-        lines = [line for line in lines 
-                    if line.strip() != "# Databricks notebook source" and \
-                    line.strip() != "# COMMAND ----------"
-                ]
+        lines_to_ignore = ("# Databricks notebook source", "# COMMAND ----------", "# DBTITLE")
+        lines = [line for line in lines if not line.strip().startswith(lines_to_ignore)]
         lines = ''.join(lines).strip().splitlines(keepends=True)
         lines = strip_hash_magic(lines)
 

packages/databricks-vscode/src/test/e2e/run_notebooks_py.e2e.ts

@@ -32,6 +32,7 @@ describe("Run py notebooks", async function () {
                 "# Databricks notebook source",
                 `spark.sql('SELECT "hello world"').show()`,
                 "# COMMAND ----------",
+                "# DBTITLE 1,My cell title",
                 "# MAGIC %sh pwd",
             ].join("\n")
         );