ARROW-5048: [Release][Rust] Set up arrow-testing in verification script
ARROW-5048: [Release][Rust] Set up arrow-testing in verification script

Author: Kouhei Sutou <kou@clear-code.com>

Closes #4063 from kou/release-setup-arrow-testing and squashes the following commits:

b6e62cfc <Kouhei Sutou>  Set up arrow-testing in verification script

xhochy/arrow,majetideepak/arrow,laurentgo/arrow,majetideepak/arrow,renesugar/arrow,cpcloud/arrow,apache/arrow,renesugar/arrow,icexelloss/arrow,kou/arrow,icexelloss/arrow,wesm/arrow,cpcloud/arrow,wesm/arrow,majetideepak/arrow,majetideepak/arrow,wesm/arrow,xhochy/arrow,renesugar/arrow,renesugar/arrow,cpcloud/arrow,laurentgo/arrow,apache/arrow,renesugar/arrow,cpcloud/arrow,cpcloud/arrow,icexelloss/arrow,apache/arrow,laurentgo/arrow,wesm/arrow,cpcloud/arrow,wesm/arrow,apache/arrow,icexelloss/arrow,laurentgo/arrow,renesugar/arrow,cpcloud/arrow,cpcloud/arrow,laurentgo/arrow,apache/arrow,laurentgo/arrow,kou/arrow,apache/arrow,wesm/arrow,kou/arrow,majetideepak/arrow,majetideepak/arrow,kou/arrow,kou/arrow,kou/arrow,majetideepak/arrow,laurentgo/arrow,xhochy/arrow,icexelloss/arrow,apache/arrow,icexelloss/arrow,apache/arrow,xhochy/arrow,xhochy/arrow,xhochy/arrow,laurentgo/arrow,icexelloss/arrow,apache/arrow,wesm/arrow,majetideepak/arrow,xhochy/arrow,kou/arrow,majetideepak/arrow,cpcloud/arrow,laurentgo/arrow,renesugar/arrow,wesm/arrow,renesugar/arrow,kou/arrow,laurentgo/arrow,kou/arrow,xhochy/arrow,wesm/arrow,kou/arrow,apache/arrow,apache/arrow,renesugar/arrow,wesm/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,majetideepak/arrow,icexelloss/arrow,majetideepak/arrow,renesugar/arrow,apache/arrow,majetideepak/arrow,renesugar/arrow,cpcloud/arrow,cpcloud/arrow,wesm/arrow,xhochy/arrow,laurentgo/arrow,icexelloss/arrow,wesm/arrow,cpcloud/arrow,icexelloss/arrow,wesm/arrow,cpcloud/arrow,wesm/arrow,cpcloud/arrow,laurentgo/arrow,renesugar/arrow,xhochy/arrow,kou/arrow,laurentgo/arrow,renesugar/arrow,kou/arrow,icexelloss/arrow,xhochy/arrow,renesugar/arrow,xhochy/arrow,xhochy/arrow,xhochy/arrow,icexelloss/arrow,majetideepak/arrow,majetideepak/arrow,kou/arrow,laurentgo/arrow,laurentgo/arrow,xhochy/arrow,renesugar/arrow,majetideepak/arrow,apache/arrow,kou/arrow