Simplify presto-benchto-benchmarks executable jar
Simplify presto-benchto-benchmarks executable jar

After 8a3db08b5ed92f131643d63d5816e430a221fae3 the `.jar` artifact
contained classes.  This resulted in `-executable.jar` being to big and
release to maven central failing due to lack of `-javadoc.jar`. The
javadoc jar is not created because there is no Java code in the module.

This restores previous packaging, while keeping the improvement
introduced in that commit.

electrum/presto,treasure-data/presto,smartnews/presto,smartnews/presto,martint/presto,martint/presto,dain/presto,losipiuk/presto,hgschmie/presto,11xor6/presto,erichwang/presto,dain/presto,dain/presto,Praveen2112/presto,losipiuk/presto,smartnews/presto,treasure-data/presto,electrum/presto,Praveen2112/presto,ebyhr/presto,martint/presto,ebyhr/presto,hgschmie/presto,11xor6/presto,Praveen2112/presto,ebyhr/presto,ebyhr/presto,losipiuk/presto,treasure-data/presto,electrum/presto,losipiuk/presto,ebyhr/presto,erichwang/presto,electrum/presto,Praveen2112/presto,erichwang/presto,dain/presto,losipiuk/presto,treasure-data/presto,smartnews/presto,11xor6/presto,hgschmie/presto,11xor6/presto,treasure-data/presto,erichwang/presto,erichwang/presto,11xor6/presto,dain/presto,treasure-data/presto,electrum/presto,Praveen2112/presto,smartnews/presto,martint/presto,hgschmie/presto,hgschmie/presto,martint/presto