Fixing kb_sdk tests, slimming down dockerfile

[ialarmedalien]

Updated the GHA to use modern Ubuntu versions.

Disabled the example SDK repo generation tests as they fail due to the tool that they rely upon no longer being available:

Step 3/8 : RUN cd /kb/deployment/lib/jars     && wget https://downloads.sourceforge.net/project/jfasta/releases/jfasta-2.2.0/jfasta-2.2.0-jar-with-dependencies.jar
[124](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:125)
 ---> Running in 2d4de77d7adf
[125](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:126)
--2023-03-07 17:58:44--  https://downloads.sourceforge.net/project/jfasta/releases/jfasta-2.2.0/jfasta-2.2.0-jar-with-dependencies.jar
[126](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:127)
Resolving downloads.sourceforge.net (downloads.sourceforge.net)... 204.68.111.105
[127](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:128)
Connecting to downloads.sourceforge.net (downloads.sourceforge.net)|204.68.111.105|:443... connected.
[128](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:129)
ERROR: The certificate of ‘downloads.sourceforge.net’ is not trusted.
[129](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:130)
ERROR: The certificate of ‘downloads.sourceforge.net’ has expired.
[130](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:131)
The command '/bin/sh -c cd /kb/deployment/lib/jars     && wget https://downloads.sourceforge.net/project/jfasta/releases/jfasta-2.2.0/jfasta-2.2.0-jar-with-dependencies.jar' returned a non-zero code: 5
[131](https://github.com/kbase/kb_sdk/actions/runs/4356796393/jobs/7615949039#step:10:132)

WSLargeDataIO builds are failing because the Java repo that they rely upon is no longer active:

Step 3/12 : RUN add-apt-repository ppa:openjdk-r/ppa 	&& sudo apt-get update 	&& sudo apt-get -y install openjdk-8-jdk 	&& echo java versions: 	&& java -version 	&& javac -version 	&& echo $JAVA_HOME 	&& ls -l /usr/lib/jvm 	&& cd /kb/runtime 	&& rm java 	&& ln -s /usr/lib/jvm/java-8-openjdk-amd64 java 	&& ls -l
[1023](https://github.com/kbase/kb_sdk/actions/runs/4385984642/jobs/7679423247#step:10:1024)
 ---> Running in 6d825436f373
[1024](https://github.com/kbase/kb_sdk/actions/runs/4385984642/jobs/7679423247#step:10:1025)
Cannot add PPA: 'ppa:openjdk-r/ppa'.
[1025](https://github.com/kbase/kb_sdk/actions/runs/4385984642/jobs/7679423247#step:10:1026)
Please check that the PPA name or format is correct.
[1026](https://github.com/kbase/kb_sdk/actions/runs/4385984642/jobs/7679423247#step:10:1027)
The command '/bin/sh -c add-apt-repository ppa:openjdk-r/ppa 	&& sudo apt-get update 	&& sudo apt-get -y install openjdk-8-jdk 	&& echo java versions: 	&& java -version 	&& javac -version 	&& echo $JAVA_HOME 	&& ls -l /usr/lib/jvm 	&& cd /kb/runtime 	&& rm java 	&& ln -s /usr/lib/jvm/java-8-openjdk-amd64 java 	&& ls -l' returned a non-zero code: 1
[1027](https://github.com/kbase/kb_sdk/actions/runs/4385984642/jobs/7679423247#step:10:1028)
Cleaning up building container: 6d825436f373

[bio-boris]

LGTM