Merge #86693 #86694

86693: release: use `stable` tag for preflight image r=celiala a=rail

Previously, we used a fixed version of the prflight docker image to
submit certification results to Red Hat Connect.

Unfortunately, their API is not stable yet, so we ended up with failures
submitting the certification result.

This PR changes the preflight docker image tag to `stable` with hope we
don't need to update the pinned image version on the release branches.

Release justification: Blocks the release process

Release note: None

86694: colexec: remove a redundant assertion r=yuzefovich a=yuzefovich

This commit removes a redundant assertion from the sort code where we
previously enforced that we had at least one partition to sort (which is
always the case). The assertion seems useless since the code works just
fine even if zero partitions are given (which will never be the case
since the sort operator short-circuits on a zero-length batch).

Release justification: low-risk cleanup.

Release note: None

Co-authored-by: Rail Aliiev <[email protected]>
Co-authored-by: Yahor Yuzefovich <[email protected]>

build/release/teamcity-publish-redhat-release.sh

@@ -80,6 +80,6 @@ docker run \
   -v $PWD/artifacts:/artifacts \
   -v ~/.docker/config.json:/temp-authfile.json:ro \
   -v ~/.docker/config.json:/tmp/docker/config.json:ro \
-  quay.io/opdev/preflight:1.1.0 check container \
+  quay.io/opdev/preflight:stable check container \
   "${rhel_repository}:${build_name}" --submit
 tc_end_block "Run preflight"