Clean up Gitops tests and add deprecation tests (#43039)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** For #40015

* Moves repeated empty mocks into a new `setupEmptyGitOpsMocks` method
* Adds new "deprecation" tests:
* In TestGitOpsFullGlobal, TestGitOpsFullTeam and
TestGitOpsFullGlobalAndTeam tests "kitchen sink" with both new and
deprecated keys
* Added keys and checks to verify `setup_experience`,
`apple_business_manager` and `volume_purchasing_program` configs
* Consolidated map of deprecated -> new GitOps keys in one place

Author: sgress454

cmd/fleetctl/fleetctl/generate_gitops.go

@@ -118,50 +118,32 @@ func jsonFieldName(t reflect.Type, fieldName string) string {
 	return name
 }
 
-// aliasRules maps deprecated JSON key names (from `json` struct tags) to their
-// new canonical names (from `renameto` struct tags). Used by replaceAliasKeys
-// and yamlMarshalRenamed to rename keys in serialized output.
-var aliasRules = map[string]string{
-	"available_teams":        "available_fleets",
-	"default_team":           "default_fleet",
-	"host_team_id":           "host_fleet_id",
-	"inherited_query_count":  "inherited_report_count",
-	"ios_team_id":            "ios_fleet_id",
-	"ios_team":               "ios_fleet",
-	"ipados_team_id":         "ipados_fleet_id",
-	"ipados_team":            "ipados_fleet",
-	"live_query_disabled":    "live_reporting_disabled",
-	"live_query_results":     "discard_reports_data",
-	"macos_team_id":          "macos_fleet_id",
-	"macos_team":             "macos_fleet",
-	"queries":                "reports",
-	"query_count":            "report_count",
-	"query_id":               "report_id",
-	"query_ids":              "report_ids",
-	"query_name":             "report_name",
-	"query_report_cap":       "report_cap",
-	"query_reports_disabled": "discard_reports_data",
-	"query_stats":            "report_stats",
-	// Deliberately not aliasing "query" as it is used exclusively to refer to SQL in GitOps.
-	// "query":                          "report",
-	"scheduled_query_id":   "scheduled_report_id",
-	"scheduled_query_name": "scheduled_report_name",
-	"team":                 "fleet",
-	"team_id":              "fleet_id",
-	"team_ids_by_name":     "fleet_ids_by_name",
-	"team_ids":             "fleet_ids",
-	"team_name":            "fleet_name",
-	"teams":                "fleets",
-
-	// MDM settings renames
-	"bootstrap_package":              "macos_bootstrap_package",
-	"custom_settings":                "configuration_profiles",
-	"enable_release_device_manually": "apple_enable_release_device_manually",
-	"macos_settings":                 "apple_settings",
-	"macos_setup":                    "setup_experience",
-	"macos_setup_assistant":          "apple_setup_assistant",
-	"manual_agent_install":           "macos_manual_agent_install",
-	"script":                         "macos_script",
+// aliasRules maps deprecated JSON key names to their new canonical names.
+// Used by replaceAliasKeys and yamlMarshalRenamed to rename keys in serialized output
+// for generate_gitops, fleetctl get (via printSpec), and fleetctl apply.
+// Derived entirely from spec.DeprecatedGitOpsKeyMappings using leaf key segments.
+var aliasRules = buildAliasRules()
+
+func buildAliasRules() map[string]string {
+	rules := make(map[string]string)
+	for _, m := range spec.DeprecatedGitOpsKeyMappings {
+		// Take the last segment of the old and new paths as the leaf key names.
+		// Remove any array indicators (e.g. "[]") in case an array key is renamed.
+		oldLeaf := m.OldPath
+		if i := strings.LastIndex(oldLeaf, "."); i >= 0 {
+			oldLeaf = oldLeaf[i+1:]
+		}
+		oldLeaf = strings.TrimSuffix(oldLeaf, "[]")
+
+		newLeaf := m.NewPath
+		if i := strings.LastIndex(newLeaf, "."); i >= 0 {
+			newLeaf = newLeaf[i+1:]
+		}
+		newLeaf = strings.TrimSuffix(newLeaf, "[]")
+
+		rules[oldLeaf] = newLeaf
+	}
+	return rules
 }
 
 // Replace deprecated keys with their new canonical names.