[Bug]: NativePCGRandom has code rot

[wallstop]

Description

NativePCGRandom has not kept up with correctness/performance changes in the AbstractRandom base and has problems such as NextBool bias, and NextFloat/NextDouble potentially returning 1.0 exactly, among others. We should bring it up to the latest and greatest speed.

Steps to Reproduce

Look at NativePCGRandom code and compare to PCGRandom

Expected Behavior

Equivalent, except for NativePCGRandom being a value type

Actual Behavior

Different behavior

Severity

Major (feature broken, no workaround)

Unity Version

Other

Package Version

3.5.0

Platform

• Editor
• Windows
• macOS
• Linux
• iOS
• Android
• WebGL
• Other

Regression

• Yes, this is a regression (worked in a previous version)

Additional Context

No response