Directly install protobuf-compiler without using an external action (#524)

* Directly install protobuf-compiler without using an external action

* Remove unused "github-token" input

.github/actions/build-dependencies/action.yml

@@ -1,12 +1,6 @@
 name: build-dependencies
 description: Installs build dependencies for Serai
 
-inputs:
-  github-token:
-    description: "GitHub token to install Protobuf with"
-    require: true
-    default:
-
 runs:
   using: "composite"
   steps:
@@ -26,17 +20,11 @@ runs:
       shell: bash
       run: |
         if [ "$RUNNER_OS" == "Linux" ]; then
-          sudo apt install -y ca-certificates
+          sudo apt install -y ca-certificates protobuf-compiler
         elif [ "$RUNNER_OS" == "Windows" ]; then
           choco install protoc
         fi
 
-    - name: Install Protobuf
-      uses: arduino/setup-protoc@a8b67ba40b37d35169e222f3bb352603327985b6
-      with:
-        repo-token: ${{ inputs.github-token }}
-      if: runner.os == 'Linux'
-
     - name: Install solc
       shell: bash
       run: |

.github/actions/test-dependencies/action.yml

@@ -2,11 +2,6 @@ name: test-dependencies
 description: Installs test dependencies for Serai
 
 inputs:
-  github-token:
-    description: "GitHub token to install Protobuf with"
-    require: true
-    default:
-
   monero-version:
     description: "Monero version to download and run as a regtest node"
     required: false
@@ -22,8 +17,6 @@ runs:
   steps:
     - name: Install Build Dependencies
       uses: ./.github/actions/build-dependencies
-      with:
-        github-token: ${{ inputs.github-token }}
 
     - name: Install Foundry
       uses: foundry-rs/foundry-toolchain@cb603ca0abb544f301eaed59ac0baf579aa6aecf