Upgrade protobuf and remove GH Action googletest-installer (#773)

* update deps to force new protobuf-src

The new version **should** remove the need for the blocked GH action.

Ref: MaterializeInc/rust-protobuf-native#20
Ref: #763

* remove googletest-installer github action

Fixes #763

* remove needless Clone of TimeUnit type which is Copy

.github/workflows/build.yml

@@ -89,10 +89,6 @@ jobs:
           name: python-wheel-license
           path: .
 
-      # To remove once https://github.com/MaterializeInc/rust-protobuf-native/issues/20 is resolved
-      - name: Install gtest
-        uses: MarkusJx/googletest-installer@v1.1
-
       - name: Install Protoc
         uses: arduino/setup-protoc@v1
         with:

.github/workflows/test.yaml

@@ -55,10 +55,6 @@ jobs:
           version: '3.20.2'
           repo-token: ${{ secrets.GITHUB_TOKEN }}
 
-      # To remove once https://github.com/MaterializeInc/rust-protobuf-native/issues/20 is resolved
-      - name: Install gtest
-        uses: MarkusJx/googletest-installer@v1.1
-
       - name: Setup Python
         uses: actions/setup-python@v5
         with: