Resource `authentik_certificate_key_pair` always reports changes

[josegomezr]

On this resource:

resource "authentik_certificate_key_pair" "cert-sample" {
  name             = "cert-sample"
  certificate_data = file("./certificates/cert-sample.pem")
}

After an apply I still gt these changes on subsequent terraform plan:

# authentik_certificate_key_pair.cert-sample will be updated in-place
  ~ resource "authentik_certificate_key_pair" "cert-sample" {
      ~ certificate_data = <<-EOT
            -----BEGIN CERTIFICATE-----
            MII...
            -----END CERTIFICATE-----
        EOT
        id               = "0b14c781-7a99-49e2-b601-827458c66fa5"
      - key_data         = (sensitive value) -> null
    }

I've downloaded the certificate from the authentik instance and it's 1:1 equal with the file terraform is referring to.

[josegomezr]

This is likely caused by:

	rc, hr, err := c.client.CryptoApi.CryptoCertificatekeypairsViewCertificateRetrieve(ctx, d.Id()).Execute()
	if err != nil {
		return helpers.HTTPToDiag(d, hr, err)
	}
	helpers.SetWrapper(d, "certificate_data", rc.Data+"\n")

	rk, _, err := c.client.CryptoApi.CryptoCertificatekeypairsViewPrivateKeyRetrieve(ctx, d.Id()).Execute()
	if err == nil {
		helpers.SetWrapper(d, "key_data", rk.Data+"\n")
	}

-- https://github.com/goauthentik/terraform-provider-authentik/blob/main/pkg/provider/resource_certificate_key_pair.go#L74-L83

Before calling helpers.SetWrapper {rc,rk}.Data should be tested for emptiness.