Clarify unpacking expectations in type alias tests

Update comments to clarify expectations for unpacking lists in type aliases.

Author: hyperkai

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

@@ -1245,8 +1245,9 @@ from typing import TypeVarTuple, Unpack
 Ts = TypeVarTuple('Ts')
 TA: TypeAlias = tuple[Unpack[Ts]]
 
-v1: TA[*list[int]]  # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
-# python3.10: Invalid syntax; you likely need to run mypy using Python 3.11 or newer
+# Only "Test suite with py310-ubuntu, mypyc-compiled" expects: Invalid syntax; you likely need to run mypy using Python 3.11 or newer
+# The other tests expects: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
+# v1: TA[*list[int]]
 
 v2: TA[Unpack[list[int]]]  # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
 [builtins fixtures/tuple.pyi]
@@ -1259,8 +1260,9 @@ from typing import TypeVarTuple, Unpack
 Ts = TypeVarTuple('Ts')
 TA: TypeAlias = tuple[Unpack[Ts]]
 
-v1: TA[*list[int]]  # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
-# python3.10: Invalid syntax
+# Only "Test suite with py310-ubuntu, mypyc-compiled" expects: Invalid syntax
+# The other tests expects: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
+# v1: TA[*list[int]]
 
 v2: TA[Unpack[list[int]]]  # E: "list[int]" cannot be unpacked (must be tuple or TypeVarTuple)
 [builtins fixtures/tuple.pyi]