More GetValues() overrides (#6896)

* Benchmarks and tests for Image and Constant GetValues

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Verify GetValues for Perlin and Random Gradients

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Standardized the assert format for GetValues().

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* More GetValues unit tests and test cleanup

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Fixed typos

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* GetValues() unit tests for surface gradients.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Benchmarks for ShapeAreaFalloff Gradient

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Added benchmarks for all remaining gradients and cleaned up the helper methods.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Renamed class for better report formatting.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Added missing Mocks dependencies for the Editor tests.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* First batch of specific GetValues() overrides.
Each one is measurably faster than the generic version.  Also, in ShapeAreaFalloffGradient, I optimized and simplified the logic a bit, so GetValue() is marginally faster too.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Change GetValues() to use span and add more overrides.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Convert GetValues() to use AZStd::span and added more overrides.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Add missing include.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* PR feedback - switch to fill

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Fixed the logic and added unit tests and comments.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

Code/Framework/AzCore/AzCore/std/containers/span.h

@@ -59,7 +59,7 @@ namespace AZStd
 
         constexpr span(pointer s, size_type length);
 
-        constexpr span(pointer first, const_pointer last);
+        constexpr span(pointer first, pointer last);
 
         // We explicitly delete this constructor because it's too easy to accidentally 
         // create a span to just the first element instead of an entire array.

Code/Framework/AzCore/AzCore/std/containers/span.inl

@@ -24,7 +24,7 @@ namespace AZStd
     }
 
     template <class Element>
-    inline constexpr span<Element>::span(pointer first, const_pointer last)
+    inline constexpr span<Element>::span(pointer first, pointer last)
         : m_begin(first)
         , m_end(last)
     { }