readline: avoid painting default prompt before prompt()

[Tseian]

Issue

#12606

Description

Track whether prompt() has been invoked and whether the configured prompt
is still the documented default. Until then, skip the default prefix when
redrawing the line or computing cursor position, fixing inconsistent
appearance after keys that refresh the line (see issue #12606).

Set the same flag when tab completion redraws the line so behavior matches
prior releases. Document that callers should call prompt() from a line
listener when they want a prompt on each new line (REPL already does).

Before

'use strict';

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
});

rl.on('line', (line) => {
  console.log(line);
});

It does not use rl.prompt() anywhere and with a common input there will be no default prompt.
However, if a user press DELETE, BACKSPACE or UP button. For example default prompt immediately and somehow unexpectedly appears shifting the whole line when I click UP button.

a
a
> a

After

Default prompt will not appear again.

a
a
a

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.52%. Comparing base (25f80fb) to head (2b79a42).

Files with missing lines	Patch %	Lines
lib/internal/readline/interface.js	92.30%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62525      +/-   ##
==========================================
- Coverage   89.65%   89.52%   -0.14%     
==========================================
  Files         712      712              
  Lines      220822   220699     -123     
  Branches    42373    42274      -99     
==========================================
- Hits       197985   197572     -413     
- Misses      14661    14929     +268     
- Partials     8176     8198      +22     

Files with missing lines	Coverage Δ
lib/internal/readline/interface.js	91.47% <92.30%> (-5.88%)	⬇️

... and 45 files with indirect coverage changes

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