Fix unpacking errors in type alias tests

Update type alias tests to reflect unpacking errors for list[int].

Author: hyperkai

test-data/unit/check-type-aliases.test

@@ -1238,24 +1238,19 @@ Ta2 = TypeAliasType("Ta2", None, type_params=(Unpack[Ts],))  # E: Free type vari
 [builtins fixtures/tuple.pyi]
 
 [case testGenericTypeAliasArgOfTypeAliasIsUnpackedTuple]
+# flags: --python-version 3.10
 from typing_extensions import TypeAlias
 from typing import TypeVarTuple, Unpack
 
 Ts = TypeVarTuple('Ts')
 
 TA: TypeAlias = tuple[Unpack[Ts]]
 
-v1: TA[*list[int]]
-v2: TA[Unpack[list[int]]]
-
-[out-python3.10]
-main:8: error: Invalid syntax
-main:9: error: Invalid syntax
+v1: TA[*list[int]]         # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
+v2: TA[Unpack[list[int]]]  # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
 
-[out]
-main:8: error: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
-main:9: error: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
 [builtins fixtures/tuple.pyi]
+xfail: True
 
 [case testAliasInstanceNameClash]
 from lib import func