RFR: 8338550: Do libubsan1 installation in test container only on Ubuntu [v2]

[Matthias Baesken]

> After [JDK-8333144](https://bugs.openjdk.org/browse/JDK-8333144) docker related tests do not work on manually configured distros other than the 'standard' Ubuntu. This is because the basic generated Dockerfile with the change from [JDK-8333144](https://bugs.openjdk.org/browse/JDK-8333144) assumes 'apt-get' being available, which is not the case when one runs the testing on RPM based distributions.
> So let's limit the libubsan1 installation to Ubuntu;  also add an 'apt-get update' to get recent package lists.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Add system property check

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/20624/files
  - new: https://git.openjdk.org/jdk/pull/20624/files/d51efd79..c6898295

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20624&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20624&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20624.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20624/head:pull/20624

PR: https://git.openjdk.org/jdk/pull/20624