feat: add woop apply threshold strategy to tf scaling policy

[UOndro]

No description provided.

[mszostok]

both here and in line 23 👍

Suggested change

	percentrage = 0.1
	percentage = 0.1

percent-rage

when you're working with TF and your emotions sneak out as you write 😄

[mszostok]

that's already validate via validation.ToDiagFunc(validation.FloatBetween(minApplyThresholdValue, maxApplyThresholdValue)) so I would remove that.

When I removed, that validation I still got a readable error:

╷
│ Error: expected percentage to be in the range (0.010000 - 2.500000), got 0.000100
│ 
│   with castai_workload_scaling_policy.woop-541-e2e-test,
│   on main.tf line 16, in resource "castai_workload_scaling_policy" "woop-541-e2e-test":
│   16:                         percentage = 0.0001
│ 
╵

[mszostok]

ok, so the most problematic part is the proper resource mapping. Running terraform apply -var-file=tf.vars twice without changing anything result in invalid diff:

1. When I use only the new strategy field -API returns the one that was populated by strategy but in my TF code the missing apply_threshold is set to default 0.1 resulting in:

     ~ resource "castai_workload_scaling_policy" "woop-541-e2e-test" {
           id                = "6ac1821a-36a8-4bbd-9d74-49b8a9808aae"
           name              = "woop-541-e2e-test"
           # (3 unchanged attributes hidden)
   
         ~ memory {
             ~ apply_threshold          = 0.2 -> 0.1
               # (6 unchanged attributes hidden)
   
               # (1 unchanged block hidden)
           }
   
           # (5 unchanged blocks hidden)
       }

2. When I use the old apply_threshold or don't specify it (use default) - API returns corresponding new strategy, but it's missing from TF definition, so it wants to remove it:

     ~ resource "castai_workload_scaling_policy" "woop-541-e2e-test" {
           id                = "423635de-1a54-4fc6-9a10-6039a273e76c"
           name              = "woop-541-e2e-test"
           # (3 unchanged attributes hidden)
   
         ~ cpu {
               # (7 unchanged attributes hidden)
   
             - apply_threshold_strategy {
                 - percentage = 0.1 -> null
                 - type       = "PERCENTAGE" -> null
               }
   
               # (1 unchanged block hidden)
           }
   
         ~ memory {
               # (7 unchanged attributes hidden)
   
             - apply_threshold_strategy {
                 - percentage = 0.2 -> null
                 - type       = "PERCENTAGE" -> null
               }
           }
   
           # (4 unchanged blocks hidden)
       }