Add an option to customise ingress pathType

[tiddlypip]

Would be nice to be able to tweak the ingress to include pathType: ImplementationSpecific to allow specifying ingress path including slash or * - (/|$)(.*) so can access via paths instead of domains

e.g.

$result = helm upgrade --wait --install -n default $helmRelease helm.datalust.co -f config.yaml
--set nginx.ingress.kubernetes.io/x-forwarded-prefix="/$basepath" --set ui.ingress.hosts="{$host}"
--set ui.ingress.path="/$base/seq/ui(/|$)(.*)" --set ui.ingress.pathType="ImplementationSpecific "
--set ingestion.ingress.hosts="{$hostName}" --set ingestion.ingress.path="/$base/seq/ingest(/|$)(.*)"
--set ingestion.ingress.pathType="ImplementationSpecific "