feat(NODE-4814): Add severity loggers and unskip tests

src/mongo_logger.ts

@@ -430,14 +430,30 @@ export class MongoLogger {
   maxDocumentLength: number;
   logDestination: MongoDBLogWritable | Writable;
 
+  emergency = this.log.bind(this, 'emergency');
+  /** @experimental */
+  alert = this.log.bind(this, 'alert');
+  /** @experimental */
+  critical = this.log.bind(this, 'critical');
+  /** @experimental */
+  error = this.log.bind(this, 'error');
+  /** @experimental */
+  warning = this.log.bind(this, 'warn');
+  /** @experimental */
+  notice = this.log.bind(this, 'notice');
+  /** @experimental */
+  info = this.log.bind(this, 'info');
+  /** @experimental */
+  debug = this.log.bind(this, 'debug');
+  /** @experimental */
+  trace = this.log.bind(this, 'trace');
+
   constructor(options: MongoLoggerOptions) {
     this.componentSeverities = options.componentSeverities;
     this.maxDocumentLength = options.maxDocumentLength;
     this.logDestination = options.logDestination;
   }
 
-  emergency = this.log.bind(this, 'emergency');
-
   private log(
     severity: SeverityLevel,
     component: MongoLoggableComponent,

test/unit/mongo_logger.test.ts

@@ -648,8 +648,7 @@ describe('class MongoLogger', function () {
           expect(stream.buffer).to.have.lengthOf(0);
         });
 
-        // TODO(NODE-4814): Unskip this test
-        context.skip('when the log severity is greater than what was configured', function () {
+        context('when the log severity is greater than what was configured', function () {
           it('does not write to logDestination', function () {
             const stream = new BufferingStream();
             const logger = new MongoLogger({