Sort OIDC providers for deterministic API response order

EnabledProviders() iterated a map, producing nondeterministic order.
Sort the slice before returning to ensure stable UI and test behavior.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/iam/oidc/service.go

@@ -30,6 +30,7 @@ import (
 	"io"
 	"math/big"
 	"net/http"
+	"slices"
 	"strings"
 	"sync"
 	"time"
@@ -258,6 +259,7 @@ func (s *Service) EnabledProviders() []coredata.OIDCProvider {
 	for p := range s.providers {
 		providers = append(providers, p)
 	}
+	slices.Sort(providers)
 	return providers
 }