Use docker build for e2e image

[alexander-demicev]

What this PR does / why we need it:

Use docker build instead of buildx for e2e because buildx takes too much for a test image to build.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #893

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[Danil-Grigorev]

Release job seems to be using docker-build-and-push task so it won’t affect it. The downside - we will no longer test release building flow this way.