Vector3/CFrame/Vector2 math overloads fail to account for union types

[jheinem1]

Typings for methods such as Vector3.mul don't appear to account for unions of valid types, e.g. number | Vector3 as opposed to just number or Vector3 (both of which are valid).

Calling these methods with unions that only contain valid types should probably be considered valid, e.g. Vector3.one.mul(condition ? Vector3.one : 1); should not throw a type error because the method could only be called with a valid type as the argument in this case.

Here is a playground link demonstrating the behavior: https://roblox-ts.com/playground/#code/PTAEBUAsFMGdtAFwO4HtQEMBOCBuGAbASwBMAoANWgGNFUsBmAOgC9otUmBbAVwIAoGASgDcoEKH68CiIgAcCATyIA7AOagABlVr0GoAFSgVPLgCN2moZRp1Grdp2n8dd5qhXQh4sFL6yFZXUtVz1DUFDGKzIyCSgiWFBYSFQ+ElALUHxidItqDB54ENs9bj5NUHyVTGpqaDlEUGgiRBgsTGNTC3b6DsiGAFpKniwcFUQlUBIE6iwiLlUMRDhMNQxVWEbWhB4VIg8kRTkETRNzdlAAHwiSqJtdezYOMoFELB4EAH5QAEZQAC4bg93J5RDEJABleZEAjYDLQSAYXD7doJJoAD0gRDMLWg6VUSBgU2gADNVC19ipEqgSUw6bEwABhABiWAwXDgZE8yFALLZHP4Qhe-DeH1A336Dg4AOM0B5fPZXhEDKBdgATLB7uqpU4+CL3l9fjLImqmB4lUA.