[IMPROVMENT] Project arctic-spark_3.1 fail to find scala library

[hhippodnsla]

Describtion: Developer will find a error "Cannot find project Scala library 2.12.15 for module arctic-spark_3.1" when they try to reload maven project in IDE (e.g. IDEA). More precisely，this issue appear on user who does not install and setup a correct scala in their development environment.

Possible reason: Module arctic-spark_3.1using scala-maven-plugin, it require related scala-library.

Possible solution:

1. install scala with correct version and setup its system env.
2. attench a scala-library dependency to module arctic-spark_3.1.

The solution 1 required change user's develop env, solution 2 has no obvious problem for me.