* Final update copyright headers to reference license files at the repo root
Signed-off-by: spham <spham@amazon.com>
* Fix copyright validator unit tests to support the stale O3DE header scenario
Signed-off-by: spham <spham@amazon.com>
The crash was because the "BlendColorGradingLutImageAttachmentId" attachment got imported to attachment database twice.
This fix avoids import this attachment twice. It also avoid crash but only report a warning if an imported attachment wasn't used in any scope.
Enable both RHI and RPI validation (no visiable performance impact observed.