Fix templating error when disabling hooks

[joscha-alisch]

Currently when disabling the hooks via

hooks:
  enabled: false

helm upgrade fails due to snuba-db-init and snuba-migrate still containing some yaml data.

---
# Source: sentry/templates/hooks/snuba-db-init.job.yaml
volumes:
        - name: config
          configMap:
            name: sentry-snuba
---
# Source: sentry/templates/hooks/snuba-migrate.job.yaml
volumes:
        - name: config
          configMap:
            name: sentry-snuba

This PR fixes that by actually removing the complete resource when setting enabled=false.

[Mokto]

Thanks! Could you update the patch version please ?

[joscha-alisch]

Yep, sorry wasn't sure if you would want to do this :)

[Mokto]

Thanks !!