Added ppc64le support

[Shafi-Hussain]

Updated build-and-push to add power image builds

[frenzymadness]

@phracek could you please take a look?

[Shafi-Hussain]

@frenzymadness @phracek
Could we please have this PR reviewed?

If there is any other support needed, we are happy to engage.

[frenzymadness]

Ping @pkubatrh and @zmiklank

[frenzymadness]

I'm sorry for the delay but I'm unable to assess the impact of a change like this and I have no idea whether this is planned. We probably have to wait till Petr returns from holidays.

[frenzymadness]

In the meantime, could you please explain why do you need this?

[Shafi-Hussain]

@frenzymadness The change is to add ppc64le architecture s2i-python-container images.

We need ppc64le images to support building and maintaining opendatahub-io ppc64le images.
Some of opendatahub-io/notebook images use s2i-python-container as their base image which is currently not available for the aforementioned architecture.

We can wait for Petr's return.

[phracek]

LGTM. Thanks. I was on PTO.

[phracek]

[test-all]