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]

The results are available here RHEL7 - OpenShift 4 - 5.30:

-----------------------------------------------
Running test test_latest_imagestreams (starting at 2024-06-10 10:37:35-04:00) ... 
-----------------------------------------------
info: No menu item `Testing the latest version in imagestreams' in node `(dir)Top'.
Tags in the image stream imagestreams/perl-centos.json:
- latest -> 5.32-ubi8
- 5.32-ubi9 -> registry.access.redhat.com/ubi9/perl-532:latest
- 5.32-ubi8 -> registry.access.redhat.com/ubi8/perl-532:latest
- 5.30-el7 -> quay.io/centos7/perl-530-centos7:latest
- 5.30 -> quay.io/centos7/perl-530-centos7:latest
- 5.26-ubi8 -> registry.access.redhat.com/ubi8/perl-526:latest
Imagestream aarch64 is not supported on rhel7
Tags in the image stream imagestreams/perl-rhel.json:
- latest -> 5.32-ubi8
- 5.32-ubi9 -> registry.redhat.io/ubi9/perl-532:latest
- 5.32-ubi8 -> registry.redhat.io/ubi8/perl-532:latest
- 5.30-el7 -> registry.redhat.io/rhscl/perl-530-rhel7:latest
- 5.30 -> registry.redhat.io/rhscl/perl-530-rhel7:latest
- 5.26-ubi8 -> registry.redhat.io/ubi8/perl-526:latest
Image version 5.30 is not latest, skipping ct_check_latest_imagestreams