Use new SBT Debian Repo before bintray is shutdown (apache#7926)

* Use new SBT Debian Repo before bintray is shutdown

We started seeing issues with building the TVM Docker images, and they stemmed from the SBT (Scala Build Tool) installation which was using bintray instead of a later SBT Debian URL. Thankfully bintray were just running some brown outs before they turn the service off on May 1st:
https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/

So I took the Scala repo URL from here:
https://www.scala-sbt.org/1.x/docs/Installing-sbt-on-Linux.html

Which is the suggested SBT URL as they may change the backend again in future:
sbt/sbt#6294

* Future-proof sbt repo setup

docker/install/ubuntu_install_sbt.sh

@@ -25,7 +25,8 @@ set -o pipefail
 apt-get update && apt-get install -y apt-transport-https
 
 # Install the necessary dependencies for sbt
-echo "deb https://dl.bintray.com/sbt/debian /" | tee -a /etc/apt/sources.list.d/sbt.list
+echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" | sudo tee /etc/apt/sources.list.d/sbt.list
+echo "deb https://repo.scala-sbt.org/scalasbt/debian /" | sudo tee /etc/apt/sources.list.d/sbt_old.list
 apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823
 
 # Note: The settings in vta/hardware/chisel/project/build.properties