make tests tolerant to authlib 1.5.2 error messages (#18390)

authlib 1.5.2 now single-quotes error messages in the claims, causing
three tests to fail.

Replace the comparison with a regex that accepts both single or double
quotes.

This succeeds the tests with both authlib 1.5.1 and 1.5.2.

See https://github.com/NixOS/nixpkgs/pull/402797 for context.

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* [x] Pull request is based on the develop branch
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- Be a short description of your change which makes sense to users.
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changelog.d/18390.misc

@@ -0,0 +1 @@
+Fixed test failures when using authlib 1.5.2.

tests/rest/client/test_login.py

@@ -1262,18 +1262,18 @@ class JWTTestCase(unittest.HomeserverTestCase):
         channel = self.jwt_login({"sub": "kermit", "iss": "invalid"})
         self.assertEqual(channel.code, 403, msg=channel.result)
         self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
-        self.assertEqual(
+        self.assertRegex(
             channel.json_body["error"],
-            'JWT validation failed: invalid_claim: Invalid claim "iss"',
+            r"^JWT validation failed: invalid_claim: Invalid claim [\"']iss[\"']$",
         )
 
         # Not providing an issuer.
         channel = self.jwt_login({"sub": "kermit"})
         self.assertEqual(channel.code, 403, msg=channel.result)
         self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
-        self.assertEqual(
+        self.assertRegex(
             channel.json_body["error"],
-            'JWT validation failed: missing_claim: Missing "iss" claim',
+            r"^JWT validation failed: missing_claim: Missing [\"']iss[\"'] claim$",
         )
 
     def test_login_iss_no_config(self) -> None:
@@ -1294,18 +1294,18 @@ class JWTTestCase(unittest.HomeserverTestCase):
         channel = self.jwt_login({"sub": "kermit", "aud": "invalid"})
         self.assertEqual(channel.code, 403, msg=channel.result)
         self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
-        self.assertEqual(
+        self.assertRegex(
             channel.json_body["error"],
-            'JWT validation failed: invalid_claim: Invalid claim "aud"',
+            r"^JWT validation failed: invalid_claim: Invalid claim [\"']aud[\"']$",
         )
 
         # Not providing an audience.
         channel = self.jwt_login({"sub": "kermit"})
         self.assertEqual(channel.code, 403, msg=channel.result)
         self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
-        self.assertEqual(
+        self.assertRegex(
             channel.json_body["error"],
-            'JWT validation failed: missing_claim: Missing "aud" claim',
+            r"^JWT validation failed: missing_claim: Missing [\"']aud[\"'] claim$",
         )
 
     def test_login_aud_no_config(self) -> None:
@@ -1313,9 +1313,9 @@ class JWTTestCase(unittest.HomeserverTestCase):
         channel = self.jwt_login({"sub": "kermit", "aud": "invalid"})
         self.assertEqual(channel.code, 403, msg=channel.result)
         self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
-        self.assertEqual(
+        self.assertRegex(
             channel.json_body["error"],
-            'JWT validation failed: invalid_claim: Invalid claim "aud"',
+            r"^JWT validation failed: invalid_claim: Invalid claim [\"']aud[\"']$",
         )
 
     def test_login_default_sub(self) -> None: