[rancher-monitoring][61.3] Update Curl version to 8.12+

[mallardduck]

For SURE-10054

Reported on: rancher-monitoring/105.1.3+up61.3.2
Should fix on all versions probably though.
Related to rancher user reporting: curl/curl-container#55

[mallardduck]

Image Mirror PR: rancher/image-mirror#879

[mallardduck]

Removed milestone from this as we need more info on the internal SURE-10054 issue. We have confirmation that this will not fix anything so may as well just skip it until we have more details.

[mallardduck]

Closing this out for now as original SURE is not confident this will be the fix for user issue.