BATCH-2221 Convert `jsr352-tck` module to Gradle

* Add Gradle task `runTck` to `build.gradle`
* Run using:
  - `./gradlew runTck -PTCK_HOME=/path/to/jsr352-tck-1.0` or
  - specify an environment variable `JSR_352_TCK_HOME` and then execute `./gradlew runTck`

Jira: https://jira.spring.io/browse/BATCH-2221
BATCH-2193: Updated What's New section