Bumps tonic to 0.11 and prost to 0.12, adapts Cargo files accordingly

Bumping tonic required cargo file edition to be bumped to 2021

.github/workflows/build.yaml

@@ -23,6 +23,10 @@ jobs:
           toolchain: ${{ matrix.toolchain }}
           override: true
           profile: minimal
+      - name: Install Protoc
+        uses: arduino/setup-protoc@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Build on Rust ${{ matrix.toolchain }}
         run: |
           cargo build ${{ matrix.arguments }} --verbose --color always
@@ -41,6 +45,10 @@ jobs:
           toolchain: stable
           profile: minimal
           components: rustfmt, clippy
+      - name: Install Protoc
+        uses: arduino/setup-protoc@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Run rustfmt
         run: |
           cargo fmt --verbose --check -- --color always

.github/workflows/cln-plugin.yaml

@@ -28,7 +28,7 @@ jobs:
           PYTHON_KEYRING_BACKEND: keyring.backends.null.Keyring
         if: ${{ steps.cache-cln.outputs.cache-hit != 'true' }}
         run: |
-          sudo apt-get update && sudo apt-get install gettext
+          sudo apt-get update && sudo apt-get install -y gettext protobuf-compiler
           git clone https://github.com/ElementsProject/lightning.git && cd lightning && git checkout v${{ env.cln_version }}
           pip install --user poetry && poetry install
           ./configure --enable-developer && poetry run make