Asset Processor: Remove gem loading from AP (#6488)

* AssetBuilder sends builder registration network message to AP

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Add AP activating status message

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* First builder handles registration.

Fixed deadlock caused by AP and AssetBuilder waiting on each other when registering by moving AP builder start code to a thread

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Clean up external builder registration

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Add thread description for builder manager idle thread

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Remove gem loading

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Clean up builder registration and remove unused functions

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Remove PostActivate call from batch application since it will be called after builders are registered

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Removal external builder dependency scanning since we no longer support builder dlls

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Fix missing bus disconnect

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Remove unused variable

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

* Moved AP-AssetBuilder specific types into AssetBuilder.Static library.  Also removed some unused/old code

Signed-off-by: amzn-mike <80125227+amzn-mike@users.noreply.github.com>

Code/Tools/AssetProcessor/native/assetprocessor.h

@@ -85,7 +85,7 @@ namespace AssetProcessor
 
     enum AssetCatalogStatus
     {
-        RequiresSaving, 
+        RequiresSaving,
         UpToDate
     };
 
@@ -213,11 +213,11 @@ namespace AssetProcessor
 
         bool m_critical = false;
         int m_priority = -1;
-        // indicates whether we need to check the server first for the outputs of this job 
+        // indicates whether we need to check the server first for the outputs of this job
         // before we start processing locally
         bool m_checkServer = false;
-         
-        // Indicates whether this job needs to be processed irrespective of whether its fingerprint got modified or not. 
+
+        // Indicates whether this job needs to be processed irrespective of whether its fingerprint got modified or not.
         bool m_autoProcessJob = false;
 
         AssetBuilderSDK::AssetBuilderDesc   m_assetBuilderDesc;
@@ -251,9 +251,9 @@ namespace AssetProcessor
 
         JobDetails() = default;
     };
- 
-    //! JobDesc struct is used for identifying jobs that need to be processed again 
-    //! because of job dependency declared on them by other jobs  
+
+    //! JobDesc struct is used for identifying jobs that need to be processed again
+    //! because of job dependency declared on them by other jobs
     struct JobDesc
     {
         AZStd::string m_databaseSourceName;
@@ -283,7 +283,7 @@ namespace AssetProcessor
         }
     };
 
-    //! JobIndentifier is an internal structure that store all the data that can uniquely identify a job 
+    //! JobIndentifier is an internal structure that store all the data that can uniquely identify a job
     struct JobIndentifier
     {
         JobDesc m_jobDesc;