Re-enabled linux tests physics (#5701)

* Re-enabled linux tests physics

* Fix for python load errors on Linux (#5627)

* Explicitly load libpython on Linux

Downstream loads of python modules that weren't linked to libpython would
fail to load because libraries were loaded using the RTLD_LOCAL flag.  This
adds a function that will explicitly load libpython on Linux using the
RTLD_GLOBAL flag.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Fix misspelled function name

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Addressing PR feedback

- Updates naming and location of things.
- Adds load code to a Gem template.
- Updates error checking.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Address further feedback

Removes the api function in favor of just having modules inherit off a
PythonLoader class, that way we get RAAI behavior and lifetime management
for free.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>
Signed-off-by: aljanru <aljanru@amazon.co.uk>

Co-authored-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

Gems/PythonAssetBuilder/Code/Source/PythonAssetBuilderModule.cpp

@@ -9,12 +9,15 @@
 #include <AzCore/Memory/SystemAllocator.h>
 #include <AzCore/Module/Module.h>
 
+#include <AzToolsFramework/API/PythonLoader.h>
+
 #include <PythonAssetBuilderSystemComponent.h>
 
 namespace PythonAssetBuilder
 {
     class PythonAssetBuilderModule
         : public AZ::Module
+        , public AzToolsFramework::EmbeddedPython::PythonLoader
     {
     public:
         AZ_RTTI(PythonAssetBuilderModule, "{35C9457E-54C2-474C-AEBE-5A70CC1D435D}", AZ::Module);