envoy matcher: add implementation for ServerNameMatcher

Description

This PR adds a trie-based implementation for ServerNameMatcher [Link].

Example Config:

matcher_tree:
  input:
    name: input
    typed_config:
      "@type": type.googleapis.com/google.protobuf.StringValue
  custom_match:
    name: domain_matcher
    typed_config:
      "@type": type.googleapis.com/xds.type.matcher.v3.ServerNameMatcher
      domain_matchers:
      - domains:
        - "api.example.com"
        on_match:
          action:
            name: test_action
            typed_config:
              "@type": type.googleapis.com/google.protobuf.StringValue
              value: exact_match
      - domains:
        - "*.example.com"
        on_match:
          action:
            name: test_action
            typed_config:
              "@type": type.googleapis.com/google.protobuf.StringValue
              value: wildcard_match
      - domains:
        - "*.com"
        on_match:
          action:
            name: test_action
            typed_config:
              "@type": type.googleapis.com/google.protobuf.StringValue
              value: global_wildcard

Commit Message: matcher: add implementation for ServerNameMatcher Additional Description: This PR adds a trie-based implementation for ServerNameMatcher for both Network & HTTP. Risk Level: Low Testing: Unit Tests Docs Changes: Added Release Notes: Added