[code-reflection] RFR: Merge master [v2]

[Paul Sandoz]

> Merge master
> 
> Take GenerateJLIClassesHelper.java from master (which somehow got messed up during a prior merge)

Paul Sandoz has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 658 commits:

 - Sync up GenerateJLIClassesHelper.java
 - Merge remote-tracking branch 'upstream/master' into merge-master
 - Rename @CodeReflection to @Reflect
   
   Reviewed-by: psandoz
 - Hat view face culling
 - jextract 25 import fix
 - Code reflection synthetic class generation moved to JavaCompiler::genCode
   
   Reviewed-by: mcimadamore
 - Code transformer
   
   Reviewed-by: mcimadamore, asotona
 - [hat] Reduces the number of threads in thread-block for small kernels
 - Split support for reflectable lambdas from lambda metafactory
   
   Reviewed-by: psandoz
 - Optimize type construction in OpBuilder
   
   Reviewed-by: asotona
 - ... and 648 more: https://git.openjdk.org/babylon/compare/2d815ac6...dc47115c

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Changes: https://git.openjdk.org/babylon/pull/697/files
  Webrev: Webrev is not available because diff is too large
  Stats: 430021 lines in 1111 files changed: 429912 ins; 17 del; 92 mod
  Patch: https://git.openjdk.org/babylon/pull/697.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/697/head:pull/697

PR: https://git.openjdk.org/babylon/pull/697