Certificate has expired or is not yet valid in misc job

Job #11349831890 failed for 2910674a:

We can see in several pods that there is an error/issue with the certificates :

Command error: Failed to initialize OpenID Connect Provider with name 'keycloak-sylva' with url 'https://keycloak.sylva/realms/sylva/.well-known/openid-configuration': Get "https://keycloak.sylva/realms/sylva/.well-known/openid-configuration": tls: failed to verify certificate: x509: certificate has expired or is not yet valid: current time 2025-09-14T20:32:40Z is after 2025-09-12T12:44:37Z

^ gitea

Error: could not initialise authentication server: could not create auth server: could not create provider: Get "https://keycloak.sylva/realms/sylva/.well-known/openid-configuration": tls: failed to verify certificate: x509: certificate has expired or is not yet valid: current time 2025-09-14T20:34:52Z is after 2025-09-12T12:44:37Z

^ flux-webui

It's probably due to the specific values that we currently used in our misc configuration : https://gitlab.com/sylva-projects/sylva-elements/ci-tooling/ci-deployment-values/-/blob/main/common/misc-units-in-capo.yml?ref_type=heads#L107

(since the certificate in ci-deployment-values is valid from 2025-09-12. So it's probably "related". I haven't investigated why only flux and gitea seem to be affected.)

(severity:high because all misc jobs are affected) (can be duplicated with #2865 (comment 2751327035))