TextInputGroup - support validation

[thatblindgeye]

Is this a new component or an extension of an existing one?
Followup to core PR patternfly/patternfly#6802. We need to add the ability for validation in a TextInputGroup.

Describe the feature
A clear and concise description of the new feature. What is the expected behavior?

Are there visuals for this feature? If applicable, please include examples for each state and for varying widths
Include screenshots or links to Marvel or other mockups.

Any other information?