Add extra maven commands (#107)

* chore(workflows): add support for extraMavenArgs input to allow running additional Maven arguments during tests

* chore(os-extension-test.yml): remove redundant build and package step

The build and package step was redundant as it was already performed in the previous step. Removing this step will improve the efficiency of the workflow.

.github/workflows/os-extension-test.yml

@@ -107,9 +107,6 @@ jobs:
         if: ${{ !inputs.nightly }} 
         run: mvn -B dependency:go-offline clean package -DskipTests=true
 
-      - name: Build and Package
-        run: mvn -B dependency:go-offline clean package -DskipTests=true
-
       - name: Get Artifact ID
         id: get-artifact-id
         run: echo "::set-output name=artifact_id::$(mvn help:evaluate -Dexpression=project.artifactId -q -DforceStdout)"