Update 'build_upload_mithril_artifact' action

Avoid unwanted usage of features when building the artifacts from the workspace.
Split in 2 phases: tooling first and then distribution.

.github/workflows/actions/build-upload-mithril-artifact/action.yml

@@ -14,10 +14,14 @@ runs:
         pip3 install toml
         python3 ./.github/workflows/scripts/edit-cargo-toml-version.py -l $(echo ${{ github.sha }} | cut -c1-7)
 
-    - name: Cargo build
+    - name: Cargo build - Tooling
       shell: bash
-      run: cargo build --release ${{ inputs.build-args }}
+      run: cargo build --release ${{ inputs.build-args }} --workspace --exclude mithril-aggregator --exclude mithril-client --exclude mithril-signer --exclude mithril-stm
 
+    - name: Cargo build - Distribution
+      shell: bash
+      run: cargo build --release ${{ inputs.build-args }} -p mithril-aggregator -p mithril-client -p mithril-common -p mithril-signer -p mithril-stm
+
     - name: Publish Mithril Distribution (${{ runner.os }}-${{ runner.arch }})
       uses: actions/upload-artifact@v3
       with: