fix(deps): Update dependency grpcio to v1.70.0 (#278)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grpcio](https://grpc.io) ([source](https://togithub.com/grpc/grpc)) | minor | `==1.68.1` -> `==1.70.0` |

---

### Release Notes

<details>
<summary>grpc/grpc (grpcio)</summary>

### [`v1.70.0`](https://togithub.com/grpc/grpc/releases/tag/v1.70.0)

[Compare Source](https://togithub.com/grpc/grpc/compare/v1.69.0...v1.70.0)

This is release 1.70.0 ([genius](https://togithub.com/grpc/grpc/blob/master/doc/g_stands_for.md)) of gRPC Core.

For gRPC documentation, see [grpc.io](https://grpc.io/). For previous releases, see [Releases](https://togithub.com/grpc/grpc/releases).

This release contains refinements, improvements, and bug fixes, with highlights listed below.

## Core

-   \[BoringSSL] Update third_party/boringssl-with-bazel. ([#&#8203;38274](https://togithub.com/grpc/grpc/issues/38274))

## C++

-   gRPC C++ begins to require C++17 or later to build and use gRPC C++. You may need the following settings:
    -   CMake: Add CMAKE_CXX_STANDARD=17 to your CMake build command.
    -   Bazel: Add --cxxopt='/std:c++17' and --host_cxxopt='/std:c++17' to your Bazel build command.
    -   gRPC 1.69, the final version compatible with C++14, will be supported until December 10, 2025, according to https://github.com/grpc/proposal/blob/master/L120-requiring-cpp17.md.

### [`v1.69.0`](https://togithub.com/grpc/grpc/releases/tag/v1.69.0)

[Compare Source](https://togithub.com/grpc/grpc/compare/v1.68.1...v1.69.0)

This is release 1.69.0 ([gridiron](https://togithub.com/grpc/grpc/blob/master/doc/g_stands_for.md)) of gRPC Core.

For gRPC documentation, see [grpc.io](https://grpc.io/). For previous releases, see [Releases](https://togithub.com/grpc/grpc/releases).

This release contains refinements, improvements, and bug fixes, with highlights listed below.

## Core

-   \[Alarm] Fix Alarm reuse on cancellation. ([#&#8203;38114](https://togithub.com/grpc/grpc/pull/38114))
-   \[xDS RBAC] Support string_match in HeaderMatcher. ([#&#8203;38185](https://togithub.com/grpc/grpc/pull/38185))
-   \[pick_first] fix shutdown bug in new PF impl. ([#&#8203;38144](https://togithub.com/grpc/grpc/pull/38144))
-   \[c-ares] Fix inverted length check in GrpcPolledFdWindows. ([#&#8203;38101](https://togithub.com/grpc/grpc/pull/38101))
-   \[RetryFilter] Copy the SliceBuffer from RetryFilter's cache to batch payload. ([#&#8203;38069](https://togithub.com/grpc/grpc/pull/38069))
-   \[EventEngine] Add stronger wording on Endpoint::Read contract. ([#&#8203;38036](https://togithub.com/grpc/grpc/pull/38036))
-   \[chttp2] Fix channelz address. ([#&#8203;38022](https://togithub.com/grpc/grpc/pull/38022))
-   \[XdsClient] Add missing authority to XdsClient metrics scope. ([#&#8203;38009](https://togithub.com/grpc/grpc/pull/38009))
-   \[EventEngine] API contract: Endpoint::Read will provide either an error or data, but never both. ([#&#8203;38019](https://togithub.com/grpc/grpc/pull/38019))
-   \[Build] Dropped Bazel 6.x support. ([#&#8203;37979](https://togithub.com/grpc/grpc/pull/37979))

## Python

-   \[Build] Override MACOSX_DEPLOYMENT_TARGET for gRPC Python. ([#&#8203;37997](https://togithub.com/grpc/grpc/pull/37997))

</details>

---

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setup.py

@@ -13,7 +13,7 @@
     "cloudquery-plugin-pb==0.0.39",
     "exceptiongroup==1.2.2",
     "black==24.10.0",
-    "grpcio==1.68.1",
+    "grpcio==1.70.0",
     "grpcio-tools==1.68.1",
     "iniconfig==2.0.0",
     "Jinja2==3.1.5",