Fixes for viewport selection issues (#5494)

* improvements to editor selection in the viewport

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* fix issue with being able to select icons that are not showing for entities inside entity containers

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* update comment after review feedback

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* updates to viewport picking code to simplify the api

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* add test to replicate near clip intersection issue

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* small tidy-up changes

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* updates to how we perform world to screen and screen to world calculations, added test coverage and some tidy-up

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* add some more tests for ViewportInteractionImpl

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* minor tweaks before PR feedback

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* fix typo in fix

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* fix for manipulator test framework tests

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* updates to RPI::View and RenderPipeline after review feedback from VickyAtAZ

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* add constexpr to ScreenPoint, ScreenVector and ScreenSize initializing constructors

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* add PrintTo functions for Screen* types

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* downgrade error to warning temporarily

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* check incoming view is null

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

* remove pragma optimize off

Signed-off-by: Tom Hulton-Harrop <82228511+hultonha@users.noreply.github.com>

Code/Framework/AzFramework/Tests/CursorStateTests.cpp

@@ -8,12 +8,13 @@
 
 #include <AzCore/UnitTest/TestTypes.h>
 #include <AzFramework/Viewport/CursorState.h>
+#include <Tests/Utils/Printers.h>
 
 namespace UnitTest
 {
     using AzFramework::CursorState;
-    using AzFramework::ScreenVector;
     using AzFramework::ScreenPoint;
+    using AzFramework::ScreenVector;
 
     class CursorStateFixture : public ::testing::Test
     {