Tiered cache migration updates

[SirCortly]

Based off this ticket:
https://jira.cfdata.org/browse/APIOPS-11748

Updates the tiered_cache migration to reflect the following:

1) off - Makes a DELETE request to /zones/%s/cache/tiered_cache_smart_topology_enable and a PATCH request to /zones/%s/argo/tiered_caching with value = off

So for a V4 resource such as: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  cache_type = "off"
}

We will create V5 resources: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "off"
}
resource "cloudflare_argo_tiered_caching" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "off"
}

2) generic - Makes a DELETE request to /zones/%s/cache/tiered_cache_smart_topology_enable and a PATCH request to /zones/%s/argo/tiered_caching with value = on 

So for a V4 resource such as: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  cache_type = "generic"
}

We will create V5 resources: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "off"
}resource "cloudflare_argo_tiered_caching" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "on"
}

3) smart - Makes a PATCH request to /zones/%s/argo/tiered_caching with value = on and a PATCH request to /zones/%s/cache/tiered_cache_smart_topology_enable with value = on

So for a V4 resource such as: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  cache_type = "smart"
}

We will create V5 resources: 
resource "cloudflare_tiered_cache" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "on"
}
resource "cloudflare_argo_tiered_caching" "example" {
  zone_id    = "0da42c8d2132a9ddaf714f9e7c920711"
  value = "on"
}

Also updates cases where cache_type is a variable reference to pull the value of that field from state and continue with the migration based on that value.