misc [tests]: Fix and update test data

(cherry picked from commit 6e762349fa759960d620d720b64c1daadd03ecde)

GitOrigin-RevId: f32f34da2124b388f31f01a21cfcc52b90c1c1b9

python/testSrc/com/jetbrains/python/types/PyCallableTypeTest.kt

@@ -817,12 +817,9 @@ class PyCallableTypeTest : PyCodeInsightTestCase() {
     @Test
     @TestFor(issues = ["PY-90348"])
     fun `Concatenate-typed decorator keeps the receiver type`() = test("""
-      from typing import Any, Callable, Concatenate, ParamSpec, TypeVar
+      from typing import Any, Callable, Concatenate
 
-      P = ParamSpec("P")
-      R = TypeVar("R")
-
-      def deco(fn: Callable[Concatenate[Any, P], R]) -> Callable[P, R]: ...
+      def deco[**P, R](fn: Callable[Concatenate[Any, P], R]) -> Callable[P, R]: ...
 
       class C:
         @deco

python/testSrc/com/jetbrains/python/types/PyGenericTypeTest.kt

@@ -785,9 +785,7 @@ class PyGenericTypeTest : PyCodeInsightTestCase() {
     @Test
     @TestFor(issues = ["PY-90345"])
     fun `parameterized union TypeAlias with class-object arm PEP695`() = test("""
-      from typing import Generic, TypeVar
-      T = TypeVar('T')
-      class Role(Generic[T]): ...
+      class Role[T]: ...
       type Alias[T] = Role[T] | type[T]
       expr: Alias[int]
       #└ TYPE Role[int] | type[int]