cli: selectIngress: Rework the prompts a touch
cli: selectIngress: Rework the prompts a touch

1. The super-wide dense rows were hard to read, add some newlines and
   whitespace.
2. Question 3 was asking for a yes/no response, but wasn't worded as a
   yes/no question
3. Question 4 was confusing, because it trailed with "if required" instead
   of leading with that.

What it looks like now:

    $ ./build-output/bin/telepresence intercept echo-easy --preview-url=true --mechanism=tcp
    Launching Telepresence Daemon v2.0.4-25-gb7f4a62c-1614892050 (api v3)
    Connecting to traffic manager...
    Connected to context default (https://34.70.76.132)

    To create a preview URL, telepresence needs to know how cluster
    ingress works for this service.  Please Confirm the ingress to use.

    1/4: What's your ingress' layer 3 (IP) address?
         You may use an IP address or a DNS name (this is usually a
         "service.namespace" DNS name).

           [default: ambassador.ambassador]:

    2/4: What's your ingress' layer 4 address (TCP port number)?

           [default: 80]:

    3/4: Does that TCP port on your ingress use TLS (as opposed to cleartext)?

           [default: n]: no
           please answer 'y' or 'n'
           [default: n]: yes
           please answer 'y' or 'n'
           [default: n]: no
           please answer 'y' or 'n'
           [default: n]: n

    4/4: If required by your ingress, specify a different layer 5 hostname
         (TLS-SNI, HTTP "Host" header) to access this service.

           [default: ambassador.ambassador]:

    Using deployment echo-easy
    intercepted
        Intercept name: echo-easy
        State         : ACTIVE
        Destination   : 127.0.0.1:8080
        Intercepting  : all TCP connections
        Preview URL   : https://frosty-robinson-6714.preview.edgestack.me

datawire/telepresence,datawire/telepresence,datawire/telepresence