feat(ec2): Add Capacity Reservations

[philipp-hinteregger]

Description of your changes

Fixes #1836

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

apiVersion: ec2.aws.crossplane.io/v1alpha1
kind: CapacityReservation
metadata:
  name: sample-reservation
spec:
  forProvider:
    region: us-east-1
    availabilityZone: us-east-1a
    instanceCount: 1
    instanceType: t3a.nano
    instancePlatform: "Linux/UNIX"
  providerConfigRef:
    name: example

[MisterMX]

@philipp-hinteregger can you rebase this on the latest master?

[github-actions]

Crossplane does not currently have enough maintainers to address every issue and pull request. This pull request has been automatically marked as stale because it has had no activity in the last 90 days. It will be closed in 14 days if no further activity occurs. Adding a comment starting with /fresh will mark this PR as not stale.