aws-logs: KMS Policy Not Updated When Using KMS CMK

### Describe the bug

From reading the [docs](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_logs-readme.html#encrypting-log-groups), using a KMS CMK with a Log Group should involve just passing the key to the Log Group. However, when doing that alone, KMS lacks the required permission to interact with Logs.

### Expected Behavior

For the `LogGroup` Construct to automatically set the required permissions to interact with KMS when a KMS CMK key is passed to it.

### Current Behavior

```
12:58:26 PM | CREATE_FAILED | AWS::Logs::LogGroup | logs00112233
Resource handler returned message: "The specified KMS key does not exist or is not allowed to be used with Arn 'arn:aws:logs:us-east-1:112233445566:log-group:PythonStack-logs00112233-AABBCCDDEEFF' (Service: CloudWatchLogs, Status Code: 400, Request <...>. HandlerErrorCode: GeneralServiceException)
```

### Reproduction Steps

```
from aws_cdk import (
Stack,
aws_kms as kms,
aws_logs as logs,
)
from constructs import Construct

class PythonStack(Stack):
def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)

key = kms.Key(self, "key")

log_group = logs.LogGroup(self, "logs", encryption_key=key)
```

### Possible Solution

When passing a KMS CMK to a `LogGroup`, automatically grant the necessary permissions to the `logs.amazonaws.com` Service Principal.

### Additional Information/Context

_No response_

### CDK CLI Version

2.114.1

### Framework Version

_No response_

### Node.js Version

18.16.0

### OS

Mac

### Language

Python

### Language Version

_No response_

### Other information

_No response_

Start at the aws_logs LogGroup construct and inspect how an encryption_key is handled when the construct is created. Reproduce the failure with the Python example, then run the relevant aws_logs tests. Done means a LogGroup using a KMS CMK grants the required CloudWatch Logs permissions and can be created successfully.

Written by the indexing model from the issue text.