Add array support for icon-padding

[random3940]

Port feature from MapLibre/JS to restore parity and close #2368. Implementation follows same idea as original PR by adding new Padding type to MapLibre/Native DSL implementation.

[louwers]

Exciting!

[github-actions]

Bloaty Results (iOS) 🐋

Compared to main

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +0.5% +69.7Ki  +0.5% +64.0Ki    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results-ios/pr-2845-compared-to-main.txt

[louwers]

Error: Failed to find metric expectations for: metrics/integration/render-tests/icon-padding/default/style.json

Error: Failed to find metric expectations for: metrics/integration/render-tests/icon-padding/databind/style.json

I can add some expectations.

[github-actions]

Bloaty Results 🐋

Compared to main

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +0.5%  +732Ki  +0.4%  +124Ki    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-2845-compared-to-main.txt

Compared to d387090 (legacy)

    FILE SIZE        VM SIZE    
 --------------  -------------- 
   +28% +32.5Mi  +426% +25.4Mi    TOTAL

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/bloaty-results/pr-2845-compared-to-legacy.txt

[github-actions]

Benchmark Results ⚡

Benchmark                                                     Time             CPU      Time Old      Time New       CPU Old       CPU New
------------------------------------------------------------------------------------------------------------------------------------------
OVERALL_GEOMEAN                                            -0.0019         -0.0018             0             0             0             0

Full report: https://maplibre-native.s3.eu-central-1.amazonaws.com/benchmark-results/pr-2845-compared-to-main.txt