azurerm_dashboard_grafana - update available major versions of Grafana in grafana_major_version

[tobiasehlert]

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Description

Changes the grafana_major_version from allowing 9 and 10 to 10 and 11, which reflects the versions available through the Azure.

PR Checklist

• I have followed the guidelines in our Contributing Documentation.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
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Change Log

Below please provide what should go into the changelog (if anything) conforming to the Changelog Format documented here.

• azurerm_dashboard_grafana - update available major versions in grafana_major_version property

This is a (please select all that apply):

• Bug Fix
• New Feature (ie adding a service, resource, or data source)
• Enhancement
• Breaking Change

Related Issue(s)

Fix #27133
Rel #26399 (removes version 9 only, but not supporting newer version)

Note

If this PR changes meaningfully during the course of review please update the title and description as required.

[stephybun]

We have a test failure

------- Stdout: -------
=== RUN   TestAccDashboardGrafana_withSku
    testcase.go:180: Step 1/2 error: Error running apply: exit status 1
        Error: creating Grafana (Subscription: "*******"
        Resource Group Name: "acctest-rg-250226130249309257"
        Grafana Name: "a-dg-250226130249309257"): performing GrafanaCreate: unexpected status 400 (400 Bad Request) with error: GrafanaMajorVersionNotSupported: The requested grafana major version '11' is not valid for sku type Essential. Valid versions: 10
          with azurerm_dashboard_grafana.test,
          on terraform_plugin_test.tf line 45, in resource "azurerm_dashboard_grafana" "test":
          45: resource "azurerm_dashboard_grafana" "test" {
        creating Grafana (Subscription: "*******"
        Resource Group Name: "acctest-rg-250226130249309257"
        Grafana Name: "a-dg-250226130249309257"): performing GrafanaCreate:
        unexpected status 400 (400 Bad Request) with error:
        GrafanaMajorVersionNotSupported: The requested grafana major version '11' is
        not valid for sku type Essential. Valid versions: 10
--- FAIL: TestAccDashboardGrafana_withSku (192.27s)
FAIL