Update devfiles/sar-training/devfile.yaml, devfiles/jupyter/devfile.yaml, devfiles/esa-theia-python/devfile.yaml files

7.19.x

See merge request !1

# Conflicts:
#   VERSION

Antora is used for building Che docs. We should be building a more
Che-compatible version of the default Antora image for use in the Che
docs devfile.

Signed-off-by: Angel Misevski <amisevsk@redhat.com>

Closes eclipse/che#17966

Signed-off-by: Eric Williams <ericwill@redhat.com>

* Switch nightly build to GH action

Run a GitHub action job everytime a change is merged, instead of using centos-ci.

See eclipse/che#18072

Signed-off-by: Eric Williams <ericwill@redhat.com>

* Update secret name

Signed-off-by: Eric Williams <ericwill@redhat.com>

* Make action names more clear

Signed-off-by: Eric Williams <ericwill@redhat.com>

* Abstract centos-ci only steps

Only use provided scripts for:
* base image build + push
* happy path image build + push

Signed-off-by: Eric Williams <ericwill@redhat.com>

Signed-off-by: Eric Williams <ericwill@redhat.com>

Signed-off-by: Mykhailo Kuznietsov <mkuznets@redhat.com>

Co-authored-by: Mykhailo Kuznietsov <mkuznets@redhat.com>