Lessen the cognitive complexity of tm.workerPortForwardIntercepts()
Lessen the cognitive complexity of tm.workerPortForwardIntercepts()

This commit doesn't change any logic. It just refactors the somewhat
complex method `trafficManager.workerPortForwardIntercepts()` into
smaller pieces.

Signed-off-by: Thomas Hallgren <5f50a84c1fa3bcff146405017f36aec1a10a9e38@datawire.io>

datawire/telepresence,datawire/telepresence,datawire/telepresence