Add GHA step block to validate if the package already exists in s3 be…

…fore pushing it

.github/workflows/build.yml

@@ -309,8 +309,20 @@ jobs:
           aws-secret-access-key: ${{ secrets.CI_INTERNAL_DEVELOPMENT_BUCKET_USER_SECRET_KEY }}
           aws-region: ${{ secrets.CI_AWS_REGION }}
 
-      - name: Upload package to S3
+      - name: Check if package exists on S3
         if: ${{ inputs.upload }}
+        run: |
+          src="artifacts/dist/${{ steps.package.outputs.name }}"
+          dest="s3://packages-dev.internal.wazuh.com/development/wazuh/5.x/main/packages/"
+          if aws s3api head-object --bucket <some_bucket> --key <some_key>; then
+            echo "exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "exists=false" >> $GITHUB_OUTPUT
+          fi
+        id: package_in_s3
+
+      - name: Upload package to S3
+        if: ${{ inputs.upload &&  steps.exists_in_s3.outputs.exists == 'false' }}
         run: |
           src="artifacts/dist/${{ steps.package.outputs.name }}"
           dest="s3://packages-dev.internal.wazuh.com/development/wazuh/5.x/main/packages/"