RUBY-1789 Update Transactions count test for MongoDB >= 4.0.7 (#1359)

Author: p-mongo

spec/spec_tests/data/transactions/count.yml

@@ -0,0 +1,64 @@
+runOn:
+    # SERVER-35388 introduced OperationNotSupportedInTransaction in 4.0.2
+    -
+        minServerVersion: "4.0.2"
+        topology: ["replicaset"]
+
+database_name: &database_name "transaction-tests"
+collection_name: &collection_name "test"
+
+data: &data
+  - {_id: 1}
+  - {_id: 2}
+  - {_id: 3}
+  - {_id: 4}
+
+tests:
+  - description: count
+
+    operations:
+      - name: startTransaction
+        object: session0
+      - name: count
+        object: collection
+        arguments:
+          session: session0
+          filter:
+            _id: 1
+        result:
+          errorCodeName: OperationNotSupportedInTransaction
+          errorLabelsOmit: ["TransientTransactionError", "UnknownTransactionCommitResult"]
+      - name: abortTransaction
+        object: session0
+
+    expectations:
+      - command_started_event:
+          command:
+            count: *collection_name
+            query:
+              _id: 1
+            readConcern:
+            lsid: session0
+            txnNumber:
+              $numberLong: "1"
+            startTransaction: true
+            autocommit: false
+            writeConcern:
+          command_name: count
+          database_name: *database_name
+      - command_started_event:
+          command:
+            abortTransaction: 1
+            lsid: session0
+            txnNumber:
+              $numberLong: "1"
+            startTransaction:
+            autocommit: false
+            writeConcern:
+          command_name: abortTransaction
+          database_name: admin
+
+    outcome:
+      collection:
+        data:
+          *data

spec/spec_tests/data/transactions/reads.yml

@@ -43,57 +43,12 @@ tests:
         data:
           *data
 
-  - description: count
+  - description: find
 
     operations:
       - &startTransaction
         name: startTransaction
         object: session0
-      - name: count
-        object: collection
-        arguments:
-          session: session0
-          filter:
-            _id: 1
-        result:
-          errorContains: "Cannot run 'count' in a multi-document transaction"
-          errorLabelsOmit: ["TransientTransactionError", "UnknownTransactionCommitResult"]
-      - name: abortTransaction
-        object: session0
-
-    expectations:
-      - command_started_event:
-          command:
-            count: *collection_name
-            query:
-              _id: 1
-            readConcern:
-            lsid: session0
-            txnNumber:
-              $numberLong: "1"
-            startTransaction: true
-            autocommit: false
-            writeConcern:
-          command_name: count
-          database_name: *database_name
-      - command_started_event:
-          command:
-            abortTransaction: 1
-            lsid: session0
-            txnNumber:
-              $numberLong: "1"
-            startTransaction:
-            autocommit: false
-            writeConcern:
-          command_name: abortTransaction
-          database_name: admin
-
-    outcome: *outcome
-
-  - description: find
-
-    operations:
-      - *startTransaction
       - &find
         name: find
         object: collection