Mv/add metrics auth

[elmariofredo]

Description of the change

Adding basicAuth to servicemonitor

Benefits

we are then eable to scrape kuma uptime when it is using authentication

Possible drawbacks

not aware of any

Applicable issues

• fixes #

Additional information

Checklist

• [x] Chart version bumped in Chart.yaml according to semver.
• [x] Variables are documented in the README.md

[dirsigler]

Thank you @elmariofredo for the awesome contribution!