Fix actions\build to use mvn help:evaluate

Since there is no `revision` property in POM, we cannot use `sed` command to extract project version from the POM.

* Use more Maven-friendly `mvn help:evaluate -Dexpression="project.version" -q -DforceStdout` command to get the current project version
* Remove tentative `finish_release_tmp.yml` since `actions\build` has been fixed now

.github/actions/build/action.yml

@@ -39,6 +39,6 @@ runs:
       id: read-version
       shell: bash
       run: |
-        version=$(sed -n 's/^.*<revision>\(.*\)<\/revision>.*$/\1/p' pom.xml)
+        version=$(mvn help:evaluate -Dexpression="project.version" -q -DforceStdout)
         echo "Version is $version"
         echo "version=$version" >> $GITHUB_OUTPUT