agent-docker-build: add -y to "microdnf update" command

[zed-0xff]

currently it looks like:

❯ make agent-docker-build
...
 => [ 2/11] RUN microdnf update && microdnf install -y   vim   wget   git   make   python3.11   python3.11-pip   && microdnf clean all                                                          18.6s
 => => #  Reinstalling:      0 packages
 => => #  Upgrading:        37 packages
 => => #  Obsoleting:        0 packages
 => => #  Removing:          0 packages
 => => #  Downgrading:       0 packages
 => => # Is this ok [y/N]:

and now it's waiting for user input, but console is redirected, so any keyboard input is ignored.

So, looking that install command already has -y, I assumed that adding -y to update is also safe enough.

Checklists

Pre-Review Checklist

• this PR does NOT contain credentials of any kind, such as API keys or username/passwords (double check config.yml.example)
• this PR has a meaningful title
• this PR links to all relevant github issues that it fixes or partially addresses
• if there is no GH issue, please create it. Each PR should have a link to an issue
• this PR has a thorough description
• Tested the changes locally

[lorenabalan]

LGTM - shall we add more backporting labels?

[github-actions]

💔 Failed to create backport PR(s)

Status	Branch	Result
✅	9.0	#3704
❌	8.17	Commit could not be cherrypicked due to conflicts
❌	8.18	Commit could not be cherrypicked due to conflicts
✅	9.1	#3705
❌	8.19	Commit could not be cherrypicked due to conflicts

Successful backport PRs will be merged automatically after passing CI.

To backport manually run:
backport --pr 3703 --autoMerge --autoMergeMethod squash

[artem-shelkovnikov]

Yeah no point backporting to 8.x