Bedrock: Cross Region Inference capability

### Describe the feature

The [new](https://eu-central-1.console.aws.amazon.com/bedrock/home?region=eu-central-1#/cross-region-inference) cross-region inference profiles allow us to use the same Bedrock model in other regions by switching out the foundation model ARN with this inference profile ARN:

However, in the Amazon Bedrock Construct Library only allows for Foundation Models or Provisioned Models.

Can we incorprate this new cross-region inference profiles feature ASAP?

### Use Case

I am invoking the Bedrock API via Step Functions tasks with this code currently:

```
claude_model_id = bedrock.FoundationModelIdentifier.ANTHROPIC_CLAUDE_V2_1
invoke_model = tasks.BedrockInvokeModel(
scope,
id + " (Invoke Model)",
model=bedrock.FoundationModel.from_foundation_model_id(
scope,
"Model",
claude_model_id,
),...
```
ideally I'd like to simply switch out the `claude_model_id` for the inference profile ARN.

### Proposed Solution

Allow for custom ARNs instead of enforcing the `bedrock.FoundationModelIdentifier` class for the model IDs.

### Other Information

_No response_

### Acknowledgements

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

### CDK version used

2.155.0

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

MacOS Ventura, M2 Chip

Start with the Amazon Bedrock Construct Library APIs used by tasks.BedrockInvokeModel, especially FoundationModel.from_foundation_model_id and FoundationModelIdentifier. Trace how the model ARN is validated, then verify that a cross-region inference profile ARN can be supplied while existing Foundation and Provisioned Model usage continues to work.

Written by the indexing model from the issue text.