<bitset>: operator[] could be SAL annotated with _In_range_(<, _Bits) #5262
Description
Following array's example:
Line 533 in 2314e1a
Found while investigating STL Hardening (#5090). I'm filing a followup issue because libcxx has tests under std/utilities/template.bitset that will emit /analyze warnings for bitset<0>. if constexpr could avoid this, but they compile their tests in older Standard modes.