Replace deprecated Node Buffer constructor

[kudlav]

Node.js new Buffer(size) is deprecated since: v6.0.0.

Replace it with Buffer.from(string) and Buffer.alloc(size).

The Buffer.alloc(size) returns zero-filled memory which was default for new Buffer(size) starting from v8.0.0.

https://nodejs.org/docs/latest-v22.x/api/buffer.html#new-bufferbuffer

[github-actions]

Bloaty Results 🐋

Compared to main

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [ = ]       0  [ = ]       0    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-3126-compared-to-main.txt

Compared to d387090 (legacy)

    FILE SIZE        VM SIZE    
 --------------  -------------- 
   +31% +36.1Mi  +438% +26.2Mi    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-3126-compared-to-legacy.txt

[github-actions]

Benchmark Results ⚡

Benchmark                                                     Time             CPU      Time Old      Time New       CPU Old       CPU New
------------------------------------------------------------------------------------------------------------------------------------------
OVERALL_GEOMEAN                                            -0.0052         -0.0052             0             0             0             0

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/benchmark-results/pr-3126-compared-to-main.txt

[github-actions]

Bloaty Results (iOS) 🐋

Compared to main

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [ = ]       0  [ = ]       0    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results-ios/pr-3126-compared-to-main.txt

[acalcutt]

This change looks good to me, based on the documentation and tests passing. I think I have seen that warning before, thouh I don't see it in the ci.