test: update tests to reflect correct RequestBodyPlainText routing

The test case 'test_string' was testing the old buggy behavior where
RequestBodyPlainText was routed to request_body_json. This test has been
removed and replaced with a new test case 'test_plain_text_body' in the
request_body_data test function to verify the correct behavior.

RequestBodyPlainText should route to request_body_data (like
RequestBodyUrlEncodedForm) so that plain text is sent as-is without
JSON parsing.

Co-Authored-By: unknown <>

Author: devin-ai-integration[bot]

unit_tests/sources/declarative/requesters/request_options/test_interpolated_request_options_provider.py

@@ -211,14 +211,6 @@ def test_interpolated_request_json(test_name, input_request_json, expected_reque
             RequestBodyJsonObject(type="RequestBodyJsonObject", value={"none_value": "{{ None }}"}),
             {},
         ),
-        (
-            "test_string",
-            RequestBodyPlainText(
-                type="RequestBodyPlainText",
-                value="""{"nested": { "key": "{{ config['option'] }}" }}""",
-            ),
-            {"nested": {"key": "OPTION"}},
-        ),
         (
             "test_nested_objects",
             RequestBodyJsonObject(
@@ -345,6 +337,14 @@ def test_interpolated_request_data(test_name, input_request_data, expected_reque
             ),
             {"2020-01-01 - 12345": "ABC"},
         ),
+        (
+            "test_plain_text_body",
+            RequestBodyPlainText(
+                type="RequestBodyPlainText",
+                value="plain text body with {{ config['option'] }}",
+            ),
+            "plain text body with OPTION",
+        ),
     ],
 )
 def test_interpolated_request_data_using_request_body(