Reduce the SQLite concurrency fixture to five iterations per writer on
Windows so slow fsync does not exhaust the busy timeout. Hold mutation
stress-test locks until a wall-clock deadline rather than depending on
Windows timer granularity.
Retain Windows' existing portable supervisor fixtures. The isolation
validation modules changed by #4862 are not present on this branch.
Native Windows ARM64 validation: 6630 tests passed, 41 skipped, 0 failed.
Backported from commit 92434dcb2b.
Signed-off-by: Shailendra Singh <shailendras@nvidia.com>
Shailendra Singh
958efaa3d8