JVMCI Release 19.3-b03

[Mohamed EZZARGHILI]

Hi

The 19.3-b03 release includes:

[GR-18349] Add default implementation for encoded SpeculationReasons.
[GR-18347] Reduce bits required for OopMapValue::oop_types.
[GR-18524] Fix some build errors.
[GR-16685] Deoptimization can recover a virtualized byte array.
[GR-17318] Add isBeingInitialized.
[GR-18537] Fix bug in debug code from OopMap changes.

The binaries are available at:

https://github.com/graalvm/openjdk8-jvmci-builder/releases/tag/jvmci-19.3-b03

- Mohamed