chore: do not use caching for docker build

[nabokihms]

Signed-off-by: m.nabokikh [email protected]

Overview

Try to build dex without using cache and see the impact

What this PR does / why we need it

There are a lot of failed docker builds, and their nature is unknown. Most of the time job freezes after preparing the cache

2022-05-06T04:34:03.2162689Z 
2022-05-06T04:34:03.2162791Z #79 exporting cache
2022-05-06T04:34:03.2163057Z #79 preparing build cache for export
2022-05-06T04:35:07.8469443Z #79 preparing build cache for export 64.7s done
2022-05-06T10:06:23.6107579Z ##[error]The operation was canceled.
2022-05-06T10:06:23.6170814Z Post job cleanup.
2022-05-06T10:06:23.7425906Z ##[group]Removing temp folder /tmp/docker-build-push-x2GXuu
2022-05-06T10:06:23.7426866Z ##[endgroup]

I would like to build Dex images without caching and see how it affects building time (and the consistency of building results).

Special notes for your reviewer

Does this PR introduce a user-facing change?

NONE

[sagikazarmark]

LGTM, let's try this. I also have a support ticket open, hopefully that will result in a permanent solution.