Fix unsupported regex in ingress-nginx config

The ingress component failed to deploy when running 
make deploy, with:

W0313 14:22:12.722815 31494 warnings.go:70] path /(/|$) cannot be used with pathType Prefix Error: 1 error occurred: * admission webhook "validate.nginx.ingress.kubernetes.io" denied the request: ingress contains invalid paths: path /raster(/|$)(.*) cannot be used with pathType Prefix path /stac(/|$)(.*) cannot be used with pathType Prefix path /vector(/|$)(.*) cannot be used with pathType Prefix path /(/|$) cannot be used with pathType Prefix

Changing the type to ImplementationSpecific fixes the error,
and the app seems to function as expected

Author: eschwartz

helm-chart/eoapi/templates/services/ingress-nginx.yaml

@@ -33,15 +33,15 @@ spec:
           {{- range $serviceName, $v := .Values }}
           {{- if has $serviceName $.Values.apiServices }}
           {{- if (and (index $v "enabled") (not $.Values.testing)) }}
-          - pathType: Prefix
+          - pathType: ImplementationSpecific
             path: "/{{ $serviceName }}(/|$)(.*)"
             backend:
               service:
                 name: {{ $serviceName }}
                 port:
                   number: {{ $.Values.service.port }}
           {{- else if (and (index $v "enabled") ($.Values.testing)) }}
-          - pathType: Prefix
+          - pathType: ImplementationSpecific
             path: "/{{ $serviceName }}{{ $.Release.Name }}(/|$)(.*)"
             backend:
               service:
@@ -52,7 +52,7 @@ spec:
           {{- end }}{{/* END: if has $serviceName $.Values.apiServices */}}
           {{- end }}{{/* END: range $serviceName, $v := .Values*/}}
           {{- if (and (not $.Values.testing) (.Values.docServer.enabled)) }}
-          - pathType: Prefix
+          - pathType: ImplementationSpecific
             path: /(/|$)
             backend:
               service: