[pydocstyle] Escaped docstring in docstring (D301 ) (#12192)

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## Summary

<!-- What's the purpose of the change? What does it do, and why? -->
This PR updates D301 rule to allow inclduing escaped docstring, e.g.
`\"""Foo.\"""` or `\"\"\"Bar.\"\"\"`, within a docstring.

Related issue: #12152 

## Test Plan

Add more test cases to D301.py and update the snapshot file.

<!-- How was it tested? -->

crates/ruff_linter/resources/test/fixtures/pydocstyle/D301.py

@@ -35,3 +35,67 @@ def make_unique_pod_id(pod_id: str) -> str | None:
 
 def shouldnt_add_raw_here2():
     u"Sum\\mary."
+
+
+def shouldnt_add_raw_for_double_quote_docstring_contains_docstring():
+    """
+    This docstring contains another double-quote docstring.
+
+        def foo():
+            \"\"\"Foo.\"\"\"
+    """
+
+
+def shouldnt_add_raw_for_double_quote_docstring_contains_docstring2():
+    """
+    This docstring contains another double-quote docstring.
+
+        def bar():
+            \"""Bar.\"""
+    
+    More content here.
+    """
+
+
+def shouldnt_add_raw_for_single_quote_docstring_contains_docstring():
+    '''
+    This docstring contains another single-quote docstring.
+
+        def foo():
+            \'\'\'Foo.\'\'\'
+    
+    More content here.
+    '''
+
+
+def shouldnt_add_raw_for_single_quote_docstring_contains_docstring2():
+    '''
+    This docstring contains another single-quote docstring.
+
+        def bar():
+            \'''Bar.\'''
+    
+    More content here.
+    '''
+
+def shouldnt_add_raw_for_docstring_contains_escaped_double_triple_quotes():
+    """
+    Escaped triple quote \""" or \"\"\".
+    """
+
+def shouldnt_add_raw_for_docstring_contains_escaped_single_triple_quotes():
+    '''
+    Escaped triple quote \''' or \'\'\'.
+    '''
+
+
+def should_add_raw_for_single_double_quote_escape():
+    """
+    This is single quote escape \".
+    """
+
+
+def should_add_raw_for_single_single_quote_escape():
+    '''
+    This is single quote escape \'.
+    '''