TCPRoute SNI match inclusion

[dtomcej]

Describe the proposal

TCPRoute should include TCP specific matches, including SNI (host) matching.

This would allow further matching and filtering to be done on TCP services.

Scope

• [ ] New specification
• [x] Traffic Access Control
• [ ] Traffic Specs
• [ ] Traffic Metrics
• [ ] Traffic Split

Possible use cases

Having more criteria to match and filter/route on about a TCPRoute will be beneficial for more fine-grained control over traffic in a cluster.

Related to #156