[EDGE-766] Prevent issue alert UUID being outputted

[Qantas94Heavy]

Context

Basically same as Canva/go-sentry#8 but implementing this in the TF provider instead.

uuid field is causing permanent TF drift, failures to apply and is not required in the alert output.

Example: https://buildkite.com/canva-org/infra-apply-terraform/builds/170168

  # module.sentry_high_frequency_alert[0].sentry_issue_alert.default will be updated in-place
  ~ resource "sentry_issue_alert" "default" {
      ~ actions      = jsonencode(
          ~ [
              ~ {
                  ~ channel    = "edge-notifications" -> "#edge-notifications"
                    id         = "sentry.integrations.slack.notify_action.SlackNotifyServiceAction"
                  ~ name       = "Send a notification to the Canva Slack workspace to edge-notifications (optionally, an ID: C021PEQFXGV) and show tags [] and notes  in notification" -> "Send a notification to the Canva Slack workspace to #edge-notifications (optionally, an ID: C021PEQFXGV) and show tags [] and notes  in notification"
                    tags       = ""
                  - uuid       = "7e1fecf2-bd58-4a8b-990c-c28a61bba5e9" -> null
                    # (3 unchanged elements hidden)
                },
            ]
        )
        id           = "14511763"
        name         = "High frequency of events(+500) in prod)"
        # (7 unchanged attributes hidden)
    }

Failure to apply:

│ Error: Provider produced inconsistent result after apply
│
│ When applying changes to
│ module.sentry_high_frequency_alert[0].sentry_issue_alert.default, provider
│ "provider[\"canva.com/infrastructure/sentry\"]" produced an unexpected new
│ value: .actions: was
│ cty.StringVal("[{\"channel\":\"#edge-notifications\",\"channel_id\":\"C021PEQFXGV\",\"id\":\"sentry.integrations.slack.notify_action.SlackNotifyServiceAction\",\"label\":\"Send
│ a slack notification\",\"name\":\"Send a notification to the Canva Slack
│ workspace to #edge-notifications (optionally, an ID: C021PEQFXGV) and show
│ tags [] and notes  in
│ notification\",\"tags\":\"\",\"workspace\":\"23762\"}]"), but now
│ cty.StringVal("[{\"channel\":\"edge-notifications\",\"channel_id\":\"C021PEQFXGV\",\"id\":\"sentry.integrations.slack.notify_action.SlackNotifyServiceAction\",\"label\":\"Send
│ a slack notification\",\"name\":\"Send a notification to the Canva Slack
│ workspace to edge-notifications (optionally, an ID: C021PEQFXGV) and show
│ tags [] and notes  in
│ notification\",\"tags\":\"\",\"uuid\":\"7e1fecf2-bd58-4a8b-990c-c28a61bba5e9\",\"workspace\":\"23762\"}]").
│
│ This is a bug in the provider, which should be reported in the provider's
│ own issue tracker.

Intent

Remove the UUID field from Sentry issue alerts.

[boh-dan]

@Qantas94Heavy thank you for help but this issue we can solve without changes to the Sentry TF PRovider. You can follow the fix in this PR - https://github.com/Canva/infrastructure/pull/95765