fix: improve errors displayed on obs creation failure, do not fail clusterization

[kristina-solovyova]

Tested on main.tf:

module "weka_deployment" {
  source                = "../.."
  prefix                = "ks"
  rg_name               = "kristina-test"
  cluster_name          = "kristina"
  allow_ssh_cidrs       = ["0.0.0.0/0"]
  allow_weka_api_cidrs = ["0.0.0.0/0"]
  cluster_size          = 6
  clients_number = 1
  weka_version = "4.4.4"
  subscription_id        = XXX
  get_weka_io_token = XXX
  assign_public_ip     = true

  tiering_enable_obs_integration = true
  tiering_obs_name = "kswekaobs"
  tiering_obs_container_name = "weka-obs-container"

Got clusterization results:

function_key=$(az functionapp keys list --name ks-kristina-function-app --resource-group kristina-test --subscription XXX --query functionKeys -o tsv)
curl --fail https://ks-kristina-function-app.azurewebsites.net/api/status\?code\=$function_key -H "Content-Type:application/json" -d '{"type": "progress"}' | jq

{
  "ready_for_clusterization": null,
  "progress": {
    "ks-kristina-backend000000": [
      "13:17:29 UTC: Running init script",
      "13:17:39 UTC: Downloading weka install script",
      "13:17:40 UTC: Installing weka",
      "13:20:26 UTC: Weka software installation completed",
      "13:20:51 UTC: Weka containers are ready",
      "13:20:52 UTC: This (ks-kristina-vmss_0:ks-kristina-backend000000:4.246.221.221) is instance 2/6 that is ready for clusterization",
      "13:22:47 UTC: Deletion protection was set successfully"
    ],
    "ks-kristina-backend000001": [
      "13:17:31 UTC: Running init script",
      "13:17:41 UTC: Downloading weka install script",
      "13:17:44 UTC: Installing weka",
      "13:20:26 UTC: Weka software installation completed",
      "13:20:52 UTC: Weka containers are ready",
      "13:20:53 UTC: This (ks-kristina-vmss_1:ks-kristina-backend000001:4.246.222.18) is instance 3/6 that is ready for clusterization",
      "13:22:50 UTC: Deletion protection was set successfully"
    ],
    "ks-kristina-backend000002": [
      "13:17:32 UTC: Running init script",
      "13:17:43 UTC: Downloading weka install script",
      "13:17:45 UTC: Installing weka",
      "13:20:40 UTC: Weka software installation completed",
      "13:21:07 UTC: Weka containers are ready",
      "13:21:09 UTC: This (ks-kristina-backend000002) is instance 6 that is ready for clusterization",
      "13:21:09 UTC: Running Clusterization",
      "13:21:22 UTC: Deployment user was created successfully",
      "13:21:52 UTC: Adding drives",
      "13:22:10 UTC: Running start-io",
      "13:22:52 UTC: Deletion protection was set successfully",
      "13:22:56 UTC: Default FS was created successfully",
      "13:22:57 UTC: Clusterization completed successfully"
    ],
    "ks-kristina-backend000003": [
      "13:17:31 UTC: Running init script",
      "13:17:42 UTC: Downloading weka install script",
      "13:17:42 UTC: Installing weka",
      "13:20:25 UTC: Weka software installation completed",
      "13:20:51 UTC: Weka containers are ready",
      "13:20:52 UTC: This (ks-kristina-vmss_3:ks-kristina-backend000003:52.191.51.208) is instance 1/6 that is ready for clusterization",
      "13:22:53 UTC: Deletion protection was set successfully"
    ],
    "ks-kristina-backend000004": [
      "13:17:29 UTC: Running init script",
      "13:17:40 UTC: Downloading weka install script",
      "13:17:40 UTC: Installing weka",
      "13:20:26 UTC: Weka software installation completed",
      "13:20:53 UTC: Weka containers are ready",
      "13:20:54 UTC: This (ks-kristina-vmss_4:ks-kristina-backend000004:52.191.54.73) is instance 5/6 that is ready for clusterization",
      "13:22:55 UTC: Deletion protection was set successfully"
    ],
    "ks-kristina-backend000005": [
      "13:17:33 UTC: Running init script",
      "13:17:43 UTC: Downloading weka install script",
      "13:17:44 UTC: Installing weka",
      "13:20:25 UTC: Weka software installation completed",
      "13:20:52 UTC: Weka containers are ready",
      "13:20:54 UTC: This (ks-kristina-vmss_5:ks-kristina-backend000005:52.191.53.52) is instance 4/6 that is ready for clusterization",
      "13:22:57 UTC: Deletion protection was set successfully"
    ]
  },
  "errors": {
    "ks-kristina-backend000002": [
      "13:22:58 UTC: OBS setup failed"
    ],
    "ks-kristina-vmss_2:ks-kristina-backend000002:4.246.222.14": [
      "13:21:08 UTC: failed to create storage account: PUT https://management.azure.com/subscriptions/d2f248b9-d054-477f-b7e8-413921532c2a/resourceGroups/kristina-test/providers/Microsoft.Storage/storageAccounts/kswekaobs\n--------------------------------------------------------------------------------\nRESPONSE 409: 409 Conflict\nERROR CODE: InvalidResourceLocation\n--------------------------------------------------------------------------------\n{\n  \"error\": {\n    \"code\": \"InvalidResourceLocation\",\n    \"message\": \"The resource 'kswekaobs' already exists in location 'westeurope' in resource group 'kristina-test'. A resource with the same name cannot be created in location 'eastus'. Please select a new resource name.\"\n  }\n}\n--------------------------------------------------------------------------------\n"
    ]
  },
  "debug": {
    "ks-kristina-vmss_2:ks-kristina-backend000002:4.246.222.14": [
      "13:21:08 UTC: creating OBS as no access key was provided"
    ]
  },
  "in_progress": null,
  "summary": {
    "ready_for_clusterization": 0,
    "stopped": 0,
    "in_progress": 0,
    "unknown": null,
    "clusterization_target": 6,
    "clusterization_instance": "",
    "clusterized": true
  }
}