aws-ec2: Add Security Group allow all traffic to self

### Describe the feature

Create a new parameter for the `SecurityGroup` construct `allow_all_self=True` that creates a Security Group with an inbound and outbound rule for all traffic to self.

### Use Case

EFA Network Interfaces requires a Security Group that allows inbound/outbound traffic to self.
Adding this option will simplify how customers uses CDK to automate Security Group creation for EFA Network Interfaces.

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/efa-start.html#efa-start-security

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### AWS CDK Library version (aws-cdk-lib)

Latest

### AWS CDK CLI version

Latest

### Environment details (OS name and version, etc.)

Any

Start by locating the aws-ec2 SecurityGroup construct and its existing ingress and egress rule handling. Check the EFA security-group requirements in the linked AWS documentation, then add coverage showing that allow_all_self=True creates inbound and outbound all-traffic self rules; done means the option works without changing existing behavior.

Written by the indexing model from the issue text.