[main] Update submodules (#32634)

- be explicit about what we're tracking
  - important for MessagePack-CSharp because we were tracking a year-old splinter
- get the latest from the remotes
- find the `DoAll` symbol
  - i.e. react to the single breaking change in `googletest`
- add dependabot.yml
  - start with keeping submodules up-to-date
    - can expand later to cover e.g. gradle, maven, or npm
  - note this file need only be present in our default branch

nit:
- change googletest name to match path
  - `set-branch` and other updates do weird things otherwise
  - but, this requires another `git submodule update --init` in some cases

Author: dougbu

.github/dependabot.yml

@@ -0,0 +1,56 @@
+version: 2
+updates:
+  # Keep submodules up to date in 'main'.
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      # Weekly interval opens PRs on Monday.
+      interval: "weekly"
+    allow:
+      - dependency-type: "all"
+    assignees:
+      - "dotnet/aspnet-build"
+    labels:
+      - area-infrastructure
+      - dependencies
+
+  # Keep submodules up to date in 'release/*' branches. (Unfortunately Dependabot security PRs can't target these.)
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      # Monthly interval opens PRs on the first of s Month.
+      interval: "monthly"
+    allow:
+      - dependency-type: "all"
+    assignees:
+      - "dotnet/aspnet-build"
+    labels:
+      - area-infrastructure
+      - dependencies
+    target-branch: "release/2.1"
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      # Monthly interval opens PRs on the first of s Month.
+      interval: "monthly"
+    allow:
+      - dependency-type: "all"
+    assignees:
+      - "dotnet/aspnet-build"
+    labels:
+      - area-infrastructure
+      - dependencies
+    target-branch: "release/3.1"
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      # Monthly interval opens PRs on the first of s Month.
+      interval: "monthly"
+    allow:
+      - dependency-type: "all"
+    assignees:
+      - "dotnet/aspnet-build"
+    labels:
+      - area-infrastructure
+      - dependencies
+    target-branch: "release/5.0"

.gitmodules

@@ -1,7 +1,8 @@
-[submodule "googletest"]
+[submodule "src/submodules/googletest"]
 	path = src/submodules/googletest
 	url = https://github.com/google/googletest
-
+	branch = master
 [submodule "src/submodules/MessagePack-CSharp"]
 	path = src/submodules/MessagePack-CSharp
 	url = https://github.com/aspnet/MessagePack-CSharp.git
+	branch = master

src/Servers/IIS/AspNetCoreModuleV2/CommonLibTests/ConfigUtilityTests.cpp

@@ -4,6 +4,7 @@
 #include "stdafx.h"
 #include "gmock/gmock.h"
 using ::testing::_;
+using ::testing::DoAll;
 using ::testing::NiceMock;
 
 namespace ConfigUtilityTests