Version 3.31.73 (based on 3f00ce2d5933c29660d179e3a7060191fd1a59cd)

[turbofan] Fix missing ChangeUint32ToUint64 in lowering of LoadBuffer (Chromium issue 444695).

Enable the embedder to specify what kind of context was disposed.

Performance and stability improvements on all platforms.

Cr-Commit-Position: refs/heads/candidates@{#25348}