AWS::EC2::CapacityReservation - [Coverage] - “StartDate” and “CommitmentDuration” are missing

### Name of the resource

AWS::EC2::CapacityReservation

### Resource name

_No response_

### Description

**The ask is to add “StartDate” and “CommitmentDuration" to make CloudFormation support Future Dated Capacity Reservation (FCR).**

Customers would like to incorporate FCR in their existing automation with CloudFormation.

Unfortunately, currently Cloudformation is missing support for FCR.
More specifically parameters “StartDate” and “CommitmentDuration” are missing [1].

FWIW, Cloudformation Doc is irritating because mentions FCRs at some places like ” If you are requesting a future-dated Capacity Reservation, you can't specify an end date and time that is within the commitment duration.”

[1] https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-capacityreservation.html

### Other Details

_No response_

Start with the AWS::EC2::CapacityReservation documentation linked in the issue and compare its supported properties with the requested Future Dated Capacity Reservation behavior. Trace where CloudFormation coverage for this resource is defined, if available, and verify that StartDate and CommitmentDuration are supported consistently with the documented commitment-duration constraints.

Written by the indexing model from the issue text.