fix: inspector prompts

[bartlomieju]

This commit fixes prompts printed to the terminal when
running with "--inspect" or "--inspect-brk" flags.

When debugger disconnects error is no longer printed as
users don't care about the reason debugger did disconnect.

A message suggesting to go to "chrome://inspect" is printed
if debugger is active.

Additionally and information that process is waiting for
debugger to connect is printed if running with "--inspect-brk"
flag.

Closes #13110
Closes #13124

[bartlomieju]

Currently Deno does this:

deno run --inspect-brk foo.js
Debugger listening on ws://127.0.0.1:9229/ws/173192a5-2d9d-430e-a5e6-4f271675325f
Visit chrome://inspect to connect to the debugger.
Deno is waiting for debugger to connect.

While Node does:

node --inspect-brk foo.js
Debugger listening on ws://127.0.0.1:9229/84790fe2-fffe-4896-a33a-e575cec30ab0
For help, see: https://nodejs.org/en/docs/inspector

Maybe we should link to https://deno.land/manual/getting_started/debugging_your_code instead?

[ry]

LGTM - i think this can be a "fix" rather than a "feature"