chore(admission-controller): Bump Admission-controller to 0.16.8

[lior-alafi-work]

What this PR does / why we need it:

Checklist

• Title of the PR starts with type and scope, (e.g. feat(agent,node-analyzer,sysdig-deploy):)
• Chart Version bumped for the respective charts
• Variables are documented in the README.md (or README.tpl in some charts)
• Check GithubAction checks (like lint) to avoid merge-check stoppers
• All test files are added in the tests folder of their respective chart and have a "_test" suffix

[mavimo]

@lior-alafi-work please integrate the values from global.sysdig.* as endpoints, see as example:

• charts/charts/cluster-shield/templates/_helpers.tpl

  Lines 88 to 92 in 76c9959

  	{{- if and (not .Values.cluster_shield.sysdig_endpoint.api_url) .Values.global.sysdig.apiHost -}}
  	{{- $_ := set $conf.sysdig_endpoint "api_url" .Values.global.sysdig.apiHost -}}
  	{{- if not (or (hasPrefix "https://" .Values.global.sysdig.apiHost) (hasPrefix "http://" .Values.global.sysdig.apiHost)) -}}
  	{{- $_ := set $conf.sysdig_endpoint "api_url" (printf "https://%s" .Values.global.sysdig.apiHost) -}}
  	{{- end -}}

and regions like:

• charts/charts/agent/templates/_helpers.tpl

  Lines 348 to 364 in 76c9959

  	{{/*
  	Determine sysdig secure endpoint based on provided region
  	*/}}
  	{{- define "secureUrl" -}}
  	{{- if (or .Values.collectorSettings.collectorHost (eq .Values.global.sysdig.region "custom")) -}}
  	{{- required "collectorSettings.collectorHost is required for custom regions" (.Values.collectorSettings.collectorHost) -}}
  	{{- else if hasKey ((include "sysdig.regions" .) | fromYaml) .Values.global.sysdig.region -}}
  	{{- include "sysdig.secureUi" . }}
  	{{- else -}}
  	{{- fail (printf "global.sysdig.region=%s provided is not recognized." .Values.global.sysdig.region ) -}}
  	{{- end -}}
  	{{- end -}}
  	{{/*
  	Determine api endpoint based on provided region
  	*/}}
  	{{- define "agent.secureApiEndpoint" -}}

Thanks!

[mavimo]

see management for global values and regions

[chen-shmilovich-sysdig]

@mavimo based on the admission controller helpers, it looks like we do use the sysdig.global values.

{{/*
Determine Secure endpoint based on provided region or .Values.sysdig.apiEndpoint
*/}}
{{- define "admissionController.apiEndpoint" -}}
    {{- if (or .Values.sysdig.apiEndpoint (eq .Values.global.sysdig.region "custom"))  -}}
        {{- required "A valid Sysdig API endpoint (.sysdig.apiEndpoint) is required" .Values.sysdig.apiEndpoint -}}
    {{- else if hasKey ((include "sysdig.regions" .) | fromYaml) .Values.global.sysdig.region }}
        {{- include "sysdig.secureApiEndpoint" . }}
    {{- end -}}
{{- end -}}

Should .Values.global.sysdig.apiHost be regarded or .Values.global.sysdig.region or both?
Thanks!