refactor renovate config and add helm.sh/images conditions

General MR

Summary

• Use renovate's built-in managers rather than custom regexes when possible.
• Added missing conditions for a few images in the helm.sh/images annotation.
• Specified the cypress image in values.yaml.

Relevant logs/screenshots

update-everything

library-subcharts-only

chart-only

chart-and-image

app-image

other-image

Linked Issue

Closes: #171 (closed)

Upgrade Notices

N/A