Rework the proxy steps, such that they are retried up to three times if needed

Also, remove a bunch of flake errors that we are not causing

gso/services/provisioning_proxy.py

@@ -4,6 +4,7 @@ LSO is responsible for executing Ansible playbooks, that deploy subscriptions.
 """
 import json
 import logging
+from typing import NoReturn
 
 import requests
 from orchestrator import inputstep
@@ -20,6 +21,7 @@ from gso.products.product_types.device import DeviceProvisioning
 from gso.products.product_types.iptrunk import Iptrunk, IptrunkProvisioning
 
 logger = logging.getLogger(__name__)
+DEFAULT_LABEL = "Provisioning proxy is running. Please come back later for the results."
 
 
 class CUDOperation(strEnum):
@@ -140,7 +142,7 @@ def deprovision_ip_trunk(subscription: Iptrunk, process_id: UUIDstr, dry_run: bo
 
 
 @inputstep("Await provisioning proxy results", assignee=Assignee("SYSTEM"))
-def await_pp_results(subscription: SubscriptionModel, label_text: str) -> FormGenerator:
+def await_pp_results(subscription: SubscriptionModel, label_text: str = DEFAULT_LABEL) -> FormGenerator:
     class ProvisioningResultPage(FormPage):
         class Config:
             title = f"Deploying {subscription.product.name}..."
@@ -150,7 +152,7 @@ def await_pp_results(subscription: SubscriptionModel, label_text: str) -> FormGe
         confirm: Accept = Accept("INCOMPLETE")
 
         @validator("pp_run_results", allow_reuse=True, pre=True, always=True)
-        def run_results_must_be_given(cls, run_results: dict) -> dict | None:
+        def run_results_must_be_given(cls, run_results: dict) -> dict | NoReturn:
             if run_results is None:
                 raise ValueError("Run results may not be empty. Wait for the provisioning proxy to finish.")
             return run_results
@@ -172,8 +174,9 @@ def confirm_pp_results(state: State) -> FormGenerator:
 
         run_status: str = ReadOnlyField(state["pp_run_results"]["status"])
         run_results: LongText = ReadOnlyField(f"{state['pp_run_results']['output']}")
+        pp_result_good_enough: bool = state["pp_run_results"]["return_code"] == 0
         confirm: Accept = Accept("INCOMPLETE")
 
-    yield ConfirmRunPage
+    confirmation = yield ConfirmRunPage
 
-    return state
+    return {"pp_did_succeed": confirmation.pp_result_good_enough}