[telegraf] render percentiles as floats (#396)

charts/telegraf/Chart.yaml

 apiVersion: v2
 name: telegraf
-version: 1.8.9
+version: 1.8.10
 appVersion: 1.21.1
 deprecated: false
 description: Telegraf is an agent written in Go for collecting, processing, aggregating, and writing metrics.

charts/telegraf/templates/_helpers.tpl

@@ -207,21 +207,24 @@ app.kubernetes.io/instance: {{ .Release.Name }}
               {{- range $b, $val := $value }}
                 {{- $i := int64 $b }}
                 {{- $tp := typeOf $val }}
-                {{- if eq $i $numOut }}
-                  {{- if eq $tp "string" }}
+                {{- if eq $tp "string" }}
         {{ $val | quote }}
-                  {{- end }}
-                  {{- if eq $tp "float64" }}
+                {{- end }}
+                {{- if eq $tp "float64" }}
+                  {{- if eq $key "percentiles" }}
+                    {{- $xval := float64 (int64 $val) }}
+                    {{- if eq $val $xval }}
+        {{ $val | int64 }}.0
+                    {{- else }}
+        {{ $val | float64 }}
+                    {{- end }}
+                  {{- else }}
         {{ $val | int64 }}
                   {{- end }}
-                {{- else }}
-                  {{- if eq $tp "string" }}
-        {{ $val | quote }},
-                  {{- end}}
-                  {{- if eq $tp "float64" }}
-        {{ $val | int64 }},
-                  {{- end }}
                 {{- end }}
+                {{- if ne $i $numOut -}}
+        ,
+                {{- end -}}
               {{- end }}
       ]
           {{- end }}