This updates the ingress controller image to v0.23.0, which was
required to add support for configuring cookie max age and expires
for ingresses via annotations on the ingress.
This also removes the --enable-dynamic-configuration flag, as the
flag is no longer valid in 0.23.0 due to the functionality being
a default behavior of the nginx ingress controller in recent
releases
Change-Id: I4917797c43ec973ed0bb311fc305b01f10abd4e5
3413dba8c0