Fix various formatting bugs in errors

[slozier]

The PythonOps.*Error methods were all passing their arguments to string.Format which can result in string.Format raising an exception based on user inputs.

For example, the following all fail with the wrong exception:

ImportError(**{"{0}": 1})
int("{0}")
System.DayOfWeek["{0}"]

Changes:

• Fixed some invalid format/args combinations.
• Turn on analyzers that detect invalid string formatting when using the PythonOps methods.
• Adds internal overloads taking a single message argument which avoids the call to string.Format. Note that the overloads are internal to avoid breaking some typeof(PythonOps).GetMethod calls.<
• Deprecate WindowsError and IOError in favour of using OSError directly.