feat: add support for setting keycloak redirect URIs for lagoon UI

[rocketeerbkw]

Support was added to set valid redirect URIs for the lagoon UI client in uselagoon/lagoon#3640. This PR adds this setting to the charts. It defaults to the UI ingress, but can be overridden by keycloakLagoonUIClientRedirectUris.

[shreddedbacon]

This is sort of a breaking change. I'm fine with it, but it has to be called out in the release notes

[rocketeerbkw]

I'm not sure this is the best option. If there are more client settings that we have to accommodate later, maybe it's better to have no default and do something like:

keycloak:
  clientSettings:
    lagoonUI:
      redirectUris: 

[shreddedbacon]

I'm not sure this is the best option. If there are more client settings that we have to accommodate later, maybe it's better to have no default and do something like:

keycloak:
  clientSettings:
    lagoonUI:
      redirectUris: 

There is prior art for this sort of structure too https://github.com/uselagoon/lagoon-charts/blob/main/charts/lagoon-core/values.yaml#L235-L243

We'd obviously need to only handle clients that exist already or are created by Lagoon so that lagoonUi can be transformed to lagoon-ui in keycloak though.