extmod/modonewire.c reliable timings for onewire.

[eliaswimmer]

When using long cables for sensors on onewire e.g. ds18b20,
the current default timings might be to optimistic.
Thus leading to bus failures and CRC errors.

Timings given by https://www.analog.com/en/technical-articles/1wire-communication-through-software.html give stable results.

[github-actions]

Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (06df3b2) 98.40% compared to head (5b70c10) 98.36%.

❗ Current head 5b70c10 differs from pull request most recent head 2e101a8. Consider uploading reports for the commit 2e101a8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #13171      +/-   ##
==========================================
- Coverage   98.40%   98.36%   -0.04%     
==========================================
  Files         159      159              
  Lines       21075    20989      -86     
==========================================
- Hits        20738    20646      -92     
- Misses        337      343       +6     

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[dpgeorge]

See related #7050.

[dpgeorge]

I merged #7050 first, which fixed the read timings (there was a long discussion there).

This PR is also merged, fixing the write timings.

Thanks for the contribution!