Add file show_all_imagestreams.py from container-common-scripts

[phracek]

This pull request only adds show_all_imagestreams.py so it is working.

The file show_all_imagestreams.py shows all available imagestreams for this container, that are specified in the directory imagestreams.

The example output will be seen in the next comment.

[phracek]

[test-openshift]

[phracek]

Results are:

Running test run_latest_imagestreams (starting at 2024-06-10 08:04:38-04:00) ... 
-----------------------------------------------
Testing the latest version in imagestreams
Tags in the image stream imagestreams/mysql-centos.json:
- latest -> 8.0-el9
- 8.0-fc -> quay.io/fedora/mysql-80:latest
- 8.0-el9 -> quay.io/sclorg/mysql-80-c9s:latest
- 8.0-el7 -> quay.io/centos7/mysql-80-centos7:latest
- 8.0-el9 -> quay.io/sclorg/mysql-80-c9s:latest
Tags in the image stream imagestreams/mysql-rhel-aarch64.json:
- latest -> 8.0-el8
- 8.0-el9 -> registry.redhat.io/rhel9/mysql-80:latest
- 8.0-el8 -> registry.redhat.io/rhel8/mysql-80:latest
Tags in the image stream imagestreams/mysql-rhel.json:
- latest -> 8.0-el8
- 8.0-el9 -> registry.redhat.io/rhel9/mysql-80:latest
- 8.0-el8 -> registry.redhat.io/rhel8/mysql-80:latest
- 8.0-el7 -> registry.redhat.io/rhscl/mysql-80-rhel7:latest
- 8.0 -> registry.redhat.io/rhscl/mysql-80-rhel7:latest