feat: extra env variables for Hydra & Kratos cronjobs

[David-Wobrock]

Related Issue or Design Document

In order for the cronjobs to send traces about their execution, they require as environment variables the correct host.
But we cannot pass them today.

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
  If this pull request addresses a security vulnerability,
  I confirm that I got approval (please contact security@ory.sh) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

[Demonsthere]

Please run make helm-docs to regen the readme file :)

[David-Wobrock]

Thanks for the review @Demonsthere 🙏
I pushed some edits.

[Demonsthere]

Completely valid use case, we can merge now :)

[David-Wobrock]

Thanks!
Looking forward the next release of the charts 🙂