[EVS] Common I/O - EoL-warning for related tf-providers

[uli-schneider]

Description of the enhancement

Regarding to OTC release notes:
EVS Common I/O reaches end-of-life on 01.01.2026

EVS Disktype: Common I/O (SATA) will reach end of life, end of 2025. (01.01.2026)
(which is only available in region "eu-de").

It would be helpful to have a "depricated" - "Warning" during terraform plan, if this Disk type is used.
(similar e.g. VPC-Shared SNAT - Message)

Releated providers with EVS options might be:

• EVS:
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/blockstorage_volume_v2
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/evs_volume_v3

• ECS:
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/compute_instance_v2
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/ecs_instance_v1

• CCE:
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/cce_node_pool_v3
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/cce_node_v3

• AS (Autoscaling):
  https://registry.terraform.io/providers/opentelekomcloud/opentelekomcloud/latest/docs/resources/as_configuration_v1

Please add also an hint in related tf-documentation pages, about EoL for this disk-type.

If you have any question, please contact the related Productmanager or me.