Replace uses of deprecated typing.Tuple, typing.Callable, etc.

Also use typing.Self to encode that `Benchmark.addInt64Axis` returns
self.

python/cuda/nvbench/__init__.pyi

@@ -1,4 +1,7 @@
-from typing import Callable, Sequence, Tuple
+# from __future__ import annotations
+
+from collections.abc import Callable, Sequence
+from typing import Optional, Self
 
 class CudaStream:
     """Represents CUDA stream
@@ -7,7 +10,7 @@ class CudaStream:
     ----
         The class is not directly constructible.
     """
-    def __cuda_stream__(self) -> Tuple[int]:
+    def __cuda_stream__(self) -> tuple[int]:
         """
         Special method implement CUDA stream protocol
         from `cuda.core`. Returns a pair of integers:
@@ -31,13 +34,13 @@ class Benchmark:
     def getName(self) -> str:
         "Get benchmark name"
         ...
-    def addInt64Axis(self, name: str, values: Sequence[int]) -> Benchmark:
+    def addInt64Axis(self, name: str, values: Sequence[int]) -> Self:
         "Add integral type parameter axis with given name and values to sweep over"
         ...
-    def addFloat64Axis(self, name: str, values: Sequence[float]) -> Benchmark:
+    def addFloat64Axis(self, name: str, values: Sequence[float]) -> Self:
         "Add floating-point type parameter axis with given name and values to sweep over"
         ...
-    def addStringAxis(sef, name: str, values: Sequence[str]) -> Benchmark:
+    def addStringAxis(sef, name: str, values: Sequence[str]) -> Self:
         "Add string type parameter axis with given name and values to sweep over"
         ...
 
@@ -68,16 +71,16 @@ class State:
     def getStream(self) -> CudaStream:
         "CudaStream object from this configuration"
         ...
-    def getInt64(self, name: str, default_value: int = None) -> int:
+    def getInt64(self, name: str, default_value: Optional[int] = None) -> int:
         "Get value for given Int64 axis from this configuration"
         ...
-    def getFloat64(self, name: str, default_value: float = None) -> float:
+    def getFloat64(self, name: str, default_value: Optional[float] = None) -> float:
         "Get value for given Float64 axis from this configuration"
         ...
-    def getString(self, name: str, default_value: str = None) -> str:
+    def getString(self, name: str, default_value: Optional[str] = None) -> str:
         "Get value for given String axis from this configuration"
         ...
-    def addElementCount(self, count: int, column_name: str = None) -> None:
+    def addElementCount(self, count: int, column_name: Optional[str] = None) -> None:
         "Add element count"
         ...
     def setElementCount(self, count: int) -> None:
@@ -145,7 +148,10 @@ class State:
         "True if (some) CUPTI metrics are being collected"
         ...
     def exec(
-        self, fn: Callable[[Launch], None], batched: bool = True, sync: bool = False
+        self,
+        fn: Callable[[Launch], None],
+        batched: Optional[bool] = True,
+        sync: Optional[bool] = False,
     ):
         """Execute callable running the benchmark.