Convert DashboardHeader and DashboardWrapper to TS

[jenny-s51]

Describe the enhancement or change
There are build issues caused by these jsx files when using them with TS demos.

The DashboardWrapper import is currently causing the build to fail in #9359 if the filetype is declared as ts and build issues were also seen in #9487 when trying to declare the demo as a ts file.

Any other information?
This was discovered through work on the #9367 epic

### Tasks
- [ ] https://github.com/patternfly/patternfly-react/issues/9553
- [ ] https://github.com/patternfly/patternfly-react/issues/9617

[wise-king-sullyman]

Closing as all tasks are complete.