Improve the diff display in the Terraform provider's output when using `keep_original_source = true`

[aballiet]

Expected Behavior

We expect to have a proper diff when applying changes to the content of a flow.

Actual Behaviour

Currently output is unreadable.

Steps To Reproduce

1. Create a flow, like this one :

resource "kestra_flow" "example" {
  namespace            = "dev"
  flow_id              = "my-flow"
  keep_original_source = true
  content              = <<EOT
id: "my-flow"
namespace: "dev"
inputs:
  - name: my-value
    type: STRING

variables:
  first: "2"

tasks:
  - id: t2
    type: io.kestra.core.tasks.debugs.Echo
    format: first {{task.id}}
    level: TRACE

taskDefaults:
  - type: io.kestra.core.tasks.debugs.Echo
    values:
      format: third {{flow.id}}

EOT
}

1. Apply your flow (create it on your Kestra instance)
2. Change whatever row
3. terraform plan and check diff
4. You should have something like this :

You can reproduce the experience with keep_original_source = false. In that case we will work as expected.

Environment Information

• Kestra Version: 0.12 SNPASHOT
• Operating System (OS / Docker / Kubernetes): k8s
• Java Version (If not docker):

Example flow

No response