Istio: Set minimum TLS version of 1.2

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-controlplane/-/blob/1.14.2-bb.1/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-controlplane/-/merge_requests/119

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/istio-controlplane/-/issues/78