Bug: Allow better naming in dashboard names

[angelbarrera92]

Currently, the dashboard name set in the organization CR:

---
apiVersion: grafana.k8spin.cloud/v1
kind: Organization
metadata:
  name: example.com
  namespace: monitoring
spec:
  dashboards:
  - name: Pods
    data: |
      {}

can not be as friendly as it should be, for example, it can not contains special characters like / or because this name is being used to override the dashboard internal uid:

grafana-multi-tenant-operator/grafana/organization.py

Lines 69 to 70 in 34360c6

	dashboardParsed['uid'] = dashboardName
	dashboardParsed['title'] = dashboardName

and it does not accept this characters.

It would be awesome if this name accepts every possible character and the uid is not a problem anymore.
Check if the uid is required for anything else that could impact the operator logic.