fix(signalilo): ingress support

[inisitijitty]

What this PR does / why we need it:

• fixes signalilo ingress support
  • {{ include "signalilo.fullname" }} on line 5 was missing the scope
  • {{ include "signalilo.fullname" }} on line 24 was missing scope and would not work (because the scope was .Values.ingress.hosts)
  • - host: {{ .host | quote }} on line 18 was an incorrect slice since the structure didn't contain the host element
• added a few more things like ingress.className, previous apiVersion, previous backend syntax, ...

Checklist

• Chart Version bumped
• I have run make docs
• Variables are documented in the values.yaml using the format required by Helm-Docs.
• PR contains the label that identifies the chart, e.g. chart/<chart-name>
• PR contains the label that identifies the type of change, which is one of
  [ bug, enhancement, documentation, change, breaking, dependency ]

[hairmare]

drive by review that says; much better, very chart, such deployment (aka lgtm)

coming from a highly opinionated pov tbh

[simu]

Thanks for the contribution!