SERVER-110074 Remove mongod fixture from serial_run test suite (#42589)

GitOrigin-RevId: 16015b85c8c6a690859996f0cb6d36d4ef653c6a

buildscripts/resmokeconfig/suites/serial_run.yml

@@ -9,16 +9,6 @@ selector:
     - jstests/serial_run/allow_partial_results_with_maxTimeMS.js
 
 executor:
-  archive:
-    hooks:
-      - ValidateCollections
-  config: {}
-  hooks:
-    - class: ValidateCollections
-    - class: CleanEveryN
-      n: 1
-  fixture:
-    class: MongoDFixture
-    mongod_options:
-      set_parameters:
-        enableTestCommands: 1
+  config:
+    shell_options:
+      nodb: ""

jstests/serial_run/index_multi.js

@@ -1,4 +1,7 @@
 // Attempt to build 63 indexes simultaneously
+const conn = MongoRunner.runMongod({});
+assert.neq(null, conn, "unable to start mongod");
+const db = conn.getDB("index_multi");
 
 Random.setRandomSeed();
 
@@ -149,3 +152,5 @@ for (var i in specs) {
 }
 
 print("SUCCESS!");
+
+MongoRunner.stopMongod(conn);

jstests/serial_run/memory.js

@@ -1,4 +1,8 @@
 // @tags: [requires_fast_memory]
+const conn = MongoRunner.runMongod({});
+assert.neq(null, conn, "unable to start mongod");
+const db = conn.getDB("memory_test");
+
 let col = db.memoryTest;
 
 let buildInfo = assert.commandWorked(db.adminCommand("buildInfo"));
@@ -64,3 +68,5 @@ doWhereTest(10);
 doWhereTest(loopNum);
 doWhereTest(loopNum);
 doWhereTest(loopNum);
+
+MongoRunner.stopMongod(conn);