This feature adds the capability to compare changes to the configuration options
in the helm values.yaml files between the current and previous release. This was
included in the 1.1 release but did not get merged. Here is the link to the
original PR: https://github.com/istio/istio.io/pull/3420Fixes: #4384
Updated tablegen.py to process the configuration options from the values.yaml
files under /istio/install/kubernetes/heml/subcharts directory and the
remaining configuration options like global, istiocoredns, istio_cni from
values.yaml under /istio/install/kubernetes/helm/istio directory.
* Fixes: #2136
This is a first take at a table-creating tablegen that categorizes
the output of tablegen.py. Still needed is the actual text that
goes in the description field.
* Address review comments