Set project_path in the SettingsRegistry in the test SetUp() functions for tests that require a project to be set

Code/Framework/Tests/ArchiveCompressionTests.cpp

@@ -11,6 +11,7 @@
 */
 
 #include <AzTest/AzTest.h>
+#include <AzCore/Settings/SettingsRegistryMergeUtils.h>
 #include <AzCore/UnitTest/TestTypes.h>
 #include <AzCore/UnitTest/UnitTest.h>
 #include <AzCore/UserSettings/UserSettingsComponent.h>
@@ -40,6 +41,13 @@ namespace UnitTest
 
         void SetUp() override
         {
+            AZ::SettingsRegistryInterface* registry = AZ::SettingsRegistry::Get();
+
+            auto projectPathKey =
+                AZ::SettingsRegistryInterface::FixedValueString(AZ::SettingsRegistryMergeUtils::BootstrapSettingsRootKey) + "/project_path";
+            registry->Set(projectPathKey, "AutomatedTesting");
+            AZ::SettingsRegistryMergeUtils::MergeSettingsToRegistry_AddRuntimeFilePaths(*registry);
+
             m_application->Start({});
             // Without this, the user settings component would attempt to save on finalize/shutdown. Since the file is
             // shared across the whole engine, if multiple tests are run in parallel, the saving could cause a crash