Remove -TargetName parameter for Hint keyword

[BernieWhite]

Description of the issue

Originally the Hint keyword could be used to name target objects and set TargetName for pipeline objects that did not implement a TargetName or Name property that was useful for identification.

Using this approach:

• Hint is called every time a rule is executed and target name for the same object may flip-flop when rules call Hint differently.
• Objects can't be named if no rules are evaluated.

PSRule v0.2.0 introduced binding options to allow customisation of TargetName up-front, which is not only more efficient but less prone to error.

Since Hint -TargetName is no longer required, we should deprecate and remove support for the -TargetName parameter of the Hint keyword.

[BernieWhite]

The -TargetName parameter was deprecated in v0.3.0 and scheduled for complete removal in v0.4.0.