Update Istio to 1.11.2

• Update Istio operator from 1.10.4 to 1.11.2 and create a release tag
• Update Istio control plane from 1.10.4 to 1.11.2 and create a release tag
• Update Big Bang default values to use 1.11.2 releases of operator and control plane
• Validate Istio operator and Istio control plane are functioning properly by checking ingress to several apps through Ingress Gateway
• Validate authservice works for at least one application (<what are we doing with envoy filters?>)
• Validate upgrade works with canary upgrade documentation

changed milestone to %1.18.0

added Istio-Support istio labels

added Big Bang Security authservice kindchore labels

changed the description

changed the description

added to epic &83 (closed)

added priority7 label

changed iteration to Big Bang Iterations Sep 7, 2021 - Sep 20, 2021

added statusblocked label

added statusdoing label and removed statusblocked label

mentioned in merge request !888 (merged)

added statusreview label and removed statusdoing label

Do not merge until after 1.17.0 Big Bang release branch is created.

added teamcore/security label

mentioned in commit 7e8279c1

closed with merge request !888 (merged)

removed statusreview label