Improve narrowing of GT_AND nodes. (dotnet/coreclr#18995)

Improve narrowing of GT_AND nodes. (dotnet/coreclr#18995)

This is a follow-up to to dotnet/coreclr#18816 which resulted in a 6 byte regression in one of the
desktop SuperPMI methods. This change removes that regression and adds a number
of improved diffs.

If we are narrowing GT_AND to an unsigned type and one of the operands can be narrowed
into that type, the result of the GT_AND will also fit into that type and can be narrowed.
The same is true if one of the operands is an int const and can be narrowed into 'dsst'.

The change also ensures that we don't call optNarrowTree(false) more than once on each of the
GT_AND operands.

Commit migrated from https://github.com/dotnet/coreclr/commit/ad09b5820b4aaf40033d930c4b64a89a78ddb556