feat(lambda): support for Provisioned Pollers (#32205)

### Reason for this change

Lambda is introducing a new property in Event Sources named `ProvisionedPollerConfig` to set provisioned pollers that read from the event sources. When specified, it allows control over the minimum and maximum number of pollers that can be provisioned to process events from the source.

This feature is currently supported for MSK and Self-managed Kafka event sources.

### Description of changes

This new property can be opted in by setting the `ProvisionedPollerConfig` field while creating event sources. The example of setting `ProvisionedPollerConfig` for is shown below:

```
fn.addEventSource(new sources.ManagedKafkaEventSource(
  {
    clusterArn,
    topic: kafkaTopic,
    startingPosition: lambda.StartingPosition.TRIM_HORIZON,
    provisionedPollerConfig: {
      minimumPollers: 1,
      maximumPollers: 3,
    },
  }))

```
### Description of how you validated changes

Have added unit test and integration test to validate the implementation

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk-testing/framework-integ/test/aws-lambda-event-sources/test/integ.kafka-selfmanaged.js.snapshot/lambda-event-source-kafka-self-managed.template.json

@@ -322,6 +322,138 @@
      "my-test-topic2"
     ]
    }
+  },
+  "F3ServiceRole2F65FFC0": {
+   "Type": "AWS::IAM::Role",
+   "Properties": {
+    "AssumeRolePolicyDocument": {
+     "Statement": [
+      {
+       "Action": "sts:AssumeRole",
+       "Effect": "Allow",
+       "Principal": {
+        "Service": "lambda.amazonaws.com"
+       }
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "ManagedPolicyArns": [
+     {
+      "Fn::Join": [
+       "",
+       [
+        "arn:",
+        {
+         "Ref": "AWS::Partition"
+        },
+        ":iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+       ]
+      ]
+     }
+    ]
+   }
+  },
+  "F3ServiceRoleDefaultPolicy1C0463D1": {
+   "Type": "AWS::IAM::Policy",
+   "Properties": {
+    "PolicyDocument": {
+     "Statement": [
+      {
+       "Action": [
+        "secretsmanager:DescribeSecret",
+        "secretsmanager:GetSecretValue"
+       ],
+       "Effect": "Allow",
+       "Resource": [
+        {
+         "Ref": "S509448A1"
+        },
+        {
+         "Ref": "SC0855C491"
+        }
+       ]
+      }
+     ],
+     "Version": "2012-10-17"
+    },
+    "PolicyName": "F3ServiceRoleDefaultPolicy1C0463D1",
+    "Roles": [
+     {
+      "Ref": "F3ServiceRole2F65FFC0"
+     }
+    ]
+   }
+  },
+  "F38FF9B13A": {
+   "Type": "AWS::Lambda::Function",
+   "Properties": {
+    "Code": {
+     "ZipFile": "exports.handler = async function handler(event) {\n    console.log('event:', JSON.stringify(event, undefined, 2));\n    return { event };\n}"
+    },
+    "Handler": "index.handler",
+    "Role": {
+     "Fn::GetAtt": [
+      "F3ServiceRole2F65FFC0",
+      "Arn"
+     ]
+    },
+    "Runtime": "nodejs18.x"
+   },
+   "DependsOn": [
+    "F3ServiceRoleDefaultPolicy1C0463D1",
+    "F3ServiceRole2F65FFC0"
+   ]
+  },
+  "F3KafkaEventSource838c4d5ff3c99c1a617120adfca83e5bmytesttopic3ED015F25": {
+   "Type": "AWS::Lambda::EventSourceMapping",
+   "Properties": {
+    "BatchSize": 100,
+    "FilterCriteria": {
+     "Filters": [
+      {
+       "Pattern": "{\"numericEquals\":[{\"numeric\":[\"=\",1]}]}"
+      }
+     ]
+    },
+    "FunctionName": {
+     "Ref": "F38FF9B13A"
+    },
+    "ProvisionedPollerConfig": {
+     "MaximumPollers": 3,
+     "MinimumPollers": 1
+    },
+    "SelfManagedEventSource": {
+     "Endpoints": {
+      "KafkaBootstrapServers": [
+       "my-self-hosted-kafka-broker-1:9092",
+       "my-self-hosted-kafka-broker-2:9092",
+       "my-self-hosted-kafka-broker-3:9092"
+      ]
+     }
+    },
+    "SelfManagedKafkaEventSourceConfig": {
+     "ConsumerGroupId": "myTestConsumerGroup3"
+    },
+    "SourceAccessConfigurations": [
+     {
+      "Type": "CLIENT_CERTIFICATE_TLS_AUTH",
+      "URI": {
+       "Ref": "SC0855C491"
+      }
+     },
+     {
+      "Type": "SERVER_ROOT_CA_CERTIFICATE",
+      "URI": {
+       "Ref": "S509448A1"
+      }
+     }
+    ],
+    "StartingPosition": "TRIM_HORIZON",
+    "Topics": [
+     "my-test-topic3"
+    ]
+   }
   }
  },
  "Parameters": {