reopen test case (#3253)

Author: msyyc

packages/typespec-python/test/generic_mock_api_tests/asynctests/test_encode_bytes_async.py

@@ -130,5 +130,4 @@ async def test_response_body(client: BytesClient, png_data: bytes):
     assert expected == await client.response_body.base64()
     assert b"".join([d async for d in (await client.response_body.octet_stream())]) == png_data
     assert b"".join([d async for d in (await client.response_body.custom_content_type())]) == png_data
-    # will reopen after TCGC release a fix version for https://github.com/Azure/typespec-azure/pull/2411
-    # assert expected == await client.response_body.base64_url()
+    assert expected == await client.response_body.base64_url()

packages/typespec-python/test/generic_mock_api_tests/test_encode_bytes.py

@@ -125,5 +125,4 @@ def test_response_body(client: BytesClient, png_data: bytes):
     assert expected == client.response_body.base64()
     assert b"".join(client.response_body.octet_stream()) == png_data
     assert b"".join(client.response_body.custom_content_type()) == png_data
-    # will reopen after TCGC release a fix version for https://github.com/Azure/typespec-azure/pull/2411
-    # assert expected == client.response_body.base64_url()
+    assert expected == client.response_body.base64_url()