Added ALB Gateway api tutorial for EKS

[siasin]

Ingress
** We provided the Ingress configuration yaml to ILS and UMS:
ODM: https://k8s-default-mycompan-254943a384-718453595.eu-west-3.elb.amazonaws.com/decisioncenter
ILS 4.2.21: https://k8s-ibmlicen-ibmlicen-843ace6cbb-1112710540.eu-west-3.elb.amazonaws.com/status?token=wDpmE8G815A7HMtqeEDtadM7
UMS:

curl -k --output ums-report.zip \
        --header "Authorization: Bearer 6632af703e20e9ae7a6273ec50a5bd25c5acdd2bc5dd556c" \
        --url "https://k8s-default-usagemet-268a224102-91341289.eu-west-3.elb.amazonaws.com/api/v1/snapshot"

ALB Gateway API
** We provided the Gateway API configuration yaml to ILS and UMS:
ODM: https://k8s-default-odmgatew-c99cfe76da-1978905201.eu-west-3.elb.amazonaws.com/decisioncenter
ILS 4.2.21: https://k8s-ibmlicen-ilsgatew-30676a6633-2000355595.eu-west-3.elb.amazonaws.com/ibm-licensing-service-instance/status?token=oJHfJaFg3ycIpH9wY07yOGI2
UMS:

curl -k --output ums-report.zip \
        --header "Authorization: Bearer 222752055eb8e739337073574eca53c857cde5452914128f" \
        --url "https://k8s-default-umsgatew-cbf0406a8e-53194884.eu-west-3.elb.amazonaws.com/api/v1/snapshot"