fix: Throttler does not show correct token time

[kenjis]

Need to rebase after merging #5463.

Description
Fixes #5458

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• [] User guide updated
• Conforms to style guide

[kenjis]

I don't get why the tokenTime should be 0.
Why not 60?

CodeIgniter4/tests/system/Throttle/ThrottleTest.php

Line 39 in 6cd0839

// first check just creates a bucket, so tokenTime should be 0

[kenjis]

After check() has been run and returned false, this method can be used to determine the time until a new token should be available and the action can be tried again.
https://codeigniter4.github.io/CodeIgniter4/libraries/throttler.html#getTokentime

It means when check() returned false, getTokentime() can't be used.
It returns 0.

[MGatner]

Generally looks good, a couple questions inline.