feat(accesslogs): allow filter accesslogs by service names whitelist

[ttys3]

What does this PR do?

Enhancements

allow filter accesslogs by service names whitelist

like this:

# Configuring Multiple Filters
accessLog:
  filePath: "/path/to/access.log"
  format: json
  filters:
    serviceNames:
      - "service1@file"
      - "service2@consulcatalog"
      - "service3@consulcatalog"

Motivation

we have traefik which proxy api requests to all kinds of service, its a very heavy server, we do not want traefik write all the logs, only a few kind of important service we want access logs.

currently there's no way to filter like this in traefik.

More

• Added/updated tests
• Added/updated documentation

Additional Notes