Process launcher updates (#6183)

* Enable process and ap connection tests on linux
* Updated 'OpenProjectManager' to use new the ProcessLauncher argument type
* Add logic to double-escape escaped double quotes in arguments on windows platforms
* Updated argument for LaunchProjectManager to reflect new ProcessLauncher argument type
* Fixed unit test arguments for 'arg=value' condition
* Fix compile errors for BuilderManager and RHI.Edit\Utils.cpp
* PAL'ify the GetCommandLineParametersAsString() to handle windows specific behavior

Signed-off-by: Steve Pham <82231385+spham-amzn@users.noreply.github.com>

Co-authored-by: byrcolin <byrcolin@amazon.com>

Code/Framework/AzFramework/Platform/iOS/AzFramework/Process/ProcessWatcher_iOS.cpp

@@ -6,10 +6,10 @@
  *
  */
 
+#include <AzCore/StringFunc/StringFunc.h>
 #include <AzFramework/Process/ProcessWatcher.h>
 #include <AzFramework/Process/ProcessCommunicator.h>
 
-
 namespace AzFramework
 {
 
@@ -83,4 +83,23 @@ namespace AzFramework
     {
 
     }
+
+    AZStd::string ProcessLauncher::ProcessLaunchInfo::GetCommandLineParametersAsString() const
+    {
+        struct CommandLineParametersVisitor
+        {
+            AZStd::string operator()(const AZStd::string& commandLine) const
+            {
+                return commandLine;
+            }
+
+            AZStd::string operator()(const AZStd::vector<AZStd::string>& commandLineArray) const
+            {
+                AZStd::string commandLineResult;
+                Az::StringFunc::Join(commandLineResult, commandLineArray.begin(), commandLineArray.end(), " ");
+                return commandLineResult;
+            }
+        };
+        return AZStd::visit(CommandLineParametersVisitor{}, m_commandlineParameters);
+    }
 } //namespace AzFramework