Pin to an older version of Ginkgo and change builder image

[phoracek]

What this PR does / why we need it:

This is the last version compatible with 1.18. Not pinning pulls a version requiring 1.22. This will be later backported down to 0.29.

Stream 8 seems to be offline and we fail to pull RPMs from the repositories. This PR replaces Stream 8 by a dedicated Go 1.18 build image.

Special notes for your reviewer:

These two must be bundled together, otherwise one fails without the other.

Release note:

NONE

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: phoracek

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• OWNERS [phoracek]

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[phoracek]

/cherry-pick release-0.31
/cherry-pick release-0.29

[kubevirt-bot]

@phoracek: once the present PR merges, I will cherry-pick it on top of release-0.29, release-0.31 in new PRs and assign them to you.

In response to this:

/cherry-pick release-0.31
/cherry-pick release-0.29

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[kubevirt-bot]

@phoracek: #373 failed to apply on top of branch "release-0.29":

Applying: Pin to an older version of Ginkgo
Applying: Change builder image
Using index info to reconstruct a base tree...
M	cmd/Dockerfile
Falling back to patching base and 3-way merge...
Auto-merging cmd/Dockerfile
CONFLICT (content): Merge conflict in cmd/Dockerfile
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"
Patch failed at 0002 Change builder image

In response to this:

/cherry-pick release-0.31
/cherry-pick release-0.29

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[kubevirt-bot]

@phoracek: new pull request created: #378

In response to this:

/cherry-pick release-0.31
/cherry-pick release-0.29

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.