feat(jobs): support secret manager references in serverless jobs defi…

[Gnoale]

Following this issue, this PR implements the secret reference ressources

Example

resource "scaleway_secret" "test" {
  name = "job-secret"
  path = "/one"
}

resource "scaleway_secret_version" "test" {
  secret_id = scaleway_secret.test.id
  data      = "your_secret"
}
locals {
  parts       = split("/", scaleway_secret.test.id)
  secret_uuid = local.parts[1]
}

resource "scaleway_job_definition" "test" {
  name         = "test-jobs-job-definition-secret"
  cpu_limit    = 120
  memory_limit = 256
  image_uri    = "docker.io/alpine:latest"

  secret_reference {
    secret_id      = data.scaleway_secret.test.secret_id
    secret_version = "latest"
    file           = "/home/dev/another_env"
  }
  secret_reference {
    secret_id      = local.secret_uuid
    secret_version = "latest"
    environment    = "SOME_ENV"
  }
}

Example of terraform plan with a secret_reference parameter update

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # scaleway_job_definition.test will be updated in-place
  ~ resource "scaleway_job_definition" "test" {
        id           = "fr-par/f5522fe5-74fd-437a-bf7e-88eb5d553cb4"
        name         = "test-jobs-job-definition-secret"
        # (9 unchanged attributes hidden)

      - secret_reference {
          - file                = "/home/dev/new_env" -> null
          - secret_id           = "1294b4a8-7296-4e33-8cf6-4ddfc087cb51" -> null
          - secret_reference_id = "db2a7a93-4dde-4708-88eb-1c3213c662f5" -> null
          - secret_version      = "latest" -> null
            # (1 unchanged attribute hidden)
        }
      - secret_reference {
          - environment         = "SOME_ENV" -> null
          - secret_id           = "1294b4a8-7296-4e33-8cf6-4ddfc087cb51" -> null
          - secret_reference_id = "2ab3e378-7253-4709-b89c-29189a0ccd99" -> null
          - secret_version      = "latest" -> null
            # (1 unchanged attribute hidden)
        }
      + secret_reference {
          + file                = "/home/dev/another_env"
          + secret_id           = "1294b4a8-7296-4e33-8cf6-4ddfc087cb51"
          + secret_reference_id = (known after apply)
          + secret_version      = "latest"
            # (1 unchanged attribute hidden)
        }
      + secret_reference {
          + environment         = "SOME_ENV"
          + secret_id           = "1294b4a8-7296-4e33-8cf6-4ddfc087cb51"
          + secret_reference_id = "2ab3e378-7253-4709-b89c-29189a0ccd99"
          + secret_version      = "latest"
        }
    }

Plan: 0 to add, 1 to change, 0 to destroy.

Note the update part is implemented by hashing the value that could be edited by the user,
the new values not found in the old ones will be created,
the old values not found in the new ones will be deleted