[GR-71654] [GR-72101] [GR-72102] Remove the Java heap allocation in AbstractCollectionPolicy.updateSizeParameters() + fixes and optimizations.

[graalvmbot]

PR can be reviewed commit-by-commit.

• Removed the Java heap allocation from AbstractCollectionPolicy.updateSizeParameters(). This makes it possible to call System.gc() from code that must be allocation free (was previously only possible for certain GC policies).
  • Native memory is now used instead of Java heap memory (see RawSizeParameters).
  • This native memory may only be accessed from @Uninterruptible code (see SizeParameters)
  • The native memory is freed after a GC or during VM teardown.
• Moved more heap-size-related values from AbstractCollectionPolicy to SizeParameters to ensure that they are updated atomically as well. Methods like AbstractCollectionPolicy.getMaximumEdenSize() noew return consistent values, even if the heap size changes concurrently.
• Optimized the allocation slowpath so that we only recompute the GC policy sizes if needed.
• Changed AbstractCollectionPolicy so that it uses the IsolateArgumentParser values. This fixes issues where wrong heap size values were used before the first garbage collection.
• Changed heap-size-related onValueUpdate() methods to ensure that the IsolateArgumentParser sees the latest option values as well.
• Fixed issues with missing GC notifications (OptionKey.afterValueUpdate() wasn't called correctly).
• Minor code cleanups.