Make sure to flag benign malloc failures in the Windows VFS as such.  Expand use of the DO_OS_MALLOC_TEST to cover the VFS functions that can now return an out of memory error.  Support an experimental --match option to the test suite that will run only those tests matching the specified pattern.

FossilOrigin-Name: 76dec8aa9dbbc39e0a7c3b358b58ce7f7a477a2b