Contribute to StyleCop SA1002 (semicolon spacing)

Contribute to StyleCop SA1002 (semicolon spacing)

However, I'm not enabling the rule permanently, as it disagrees with VS IDE0055 about the spacing around semicolons at the end of empty while and for loops.

Because this also impacts `for (;;)` loops, I also searched and replaced those with `while (true)`, to standardize on that across the codebase.

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/63c09bbf88cc6524ea8478fdea430ba45275a933