please add support for [--min-tls-cipher-suite] on "az functionapp config set"

**Related command**
az functionapp config set

**Is your feature request related to a problem? Please describe.**
no

**Describe the solution you'd like**
support for [--min-tls-cipher-suite] , as exists for az webapp config set

**Describe alternatives you've considered**
using the Portal is fine for single scenarios, but not large scale programmatic updates

**Additional context**
n/a
