[MM-61756] Attribute Based Access Control - Phase 1 (#30785)

Attribute Based Access Control - Base
* MM-63662

* MM-63919

* MM-63954

* MM-63955 

* MM-63425

* MM-63426

* MM-63458

* MM-63459

* MM-63603

* MM-63845

* MM-64146

* MM-64199

* MM-64201

* MM-64233

* MM-64247

* MM-64268

---------

Co-authored-by: Harshil Sharma <harshilsharma63@gmail.com>
Co-authored-by: Pablo Andrés Vélez Vidal <pablovv2012@gmail.com>
Co-authored-by: abhijit-singh <abhijitsingh0702@gmail.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/einterfaces/mocks/PolicyDecisionPointInterface.go

@@ -16,24 +16,22 @@ type PolicyDecisionPointInterface struct {
 }
 
 // AccessEvaluation provides a mock function with given fields: rctx, accessRequest
-func (_m *PolicyDecisionPointInterface) AccessEvaluation(rctx request.CTX, accessRequest model.AccessRequest) (*model.AccessDecision, *model.AppError) {
+func (_m *PolicyDecisionPointInterface) AccessEvaluation(rctx request.CTX, accessRequest model.AccessRequest) (model.AccessDecision, *model.AppError) {
 	ret := _m.Called(rctx, accessRequest)
 
 	if len(ret) == 0 {
 		panic("no return value specified for AccessEvaluation")
 	}
 
-	var r0 *model.AccessDecision
+	var r0 model.AccessDecision
 	var r1 *model.AppError
-	if rf, ok := ret.Get(0).(func(request.CTX, model.AccessRequest) (*model.AccessDecision, *model.AppError)); ok {
+	if rf, ok := ret.Get(0).(func(request.CTX, model.AccessRequest) (model.AccessDecision, *model.AppError)); ok {
 		return rf(rctx, accessRequest)
 	}
-	if rf, ok := ret.Get(0).(func(request.CTX, model.AccessRequest) *model.AccessDecision); ok {
+	if rf, ok := ret.Get(0).(func(request.CTX, model.AccessRequest) model.AccessDecision); ok {
 		r0 = rf(rctx, accessRequest)
 	} else {
-		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*model.AccessDecision)
-		}
+		r0 = ret.Get(0).(model.AccessDecision)
 	}
 
 	if rf, ok := ret.Get(1).(func(request.CTX, model.AccessRequest) *model.AppError); ok {