ldap: Add user DN attributes list config param (#19758)

This change uses the updated ldap library in minio/pkg (bumped
up to v3). A new config parameter is added for LDAP configuration to
specify extra user attributes to load from the LDAP server and to store
them as additional claims for the user.

A test is added in sts_handlers.go that shows how to access the LDAP
attributes as a claim.

This is in preparation for adding SSH pubkey authentication to MinIO's SFTP
integration.

internal/config/identity/openid/jwt.go

@@ -30,8 +30,8 @@ import (
 	jwtgo "github.com/golang-jwt/jwt/v4"
 	"github.com/minio/minio/internal/arn"
 	"github.com/minio/minio/internal/auth"
-	xnet "github.com/minio/pkg/v2/net"
-	"github.com/minio/pkg/v2/policy"
+	xnet "github.com/minio/pkg/v3/net"
+	"github.com/minio/pkg/v3/policy"
 )
 
 type publicKeys struct {

internal/config/identity/openid/jwt_test.go

@@ -35,7 +35,7 @@ import (
 	"github.com/minio/minio/internal/arn"
 	"github.com/minio/minio/internal/config"
 	jwtm "github.com/minio/minio/internal/jwt"
-	xnet "github.com/minio/pkg/v2/net"
+	xnet "github.com/minio/pkg/v3/net"
 )
 
 func TestUpdateClaimsExpiry(t *testing.T) {

internal/config/identity/openid/openid.go

@@ -36,9 +36,9 @@ import (
 	"github.com/minio/minio/internal/config"
 	"github.com/minio/minio/internal/config/identity/openid/provider"
 	"github.com/minio/minio/internal/hash/sha256"
-	"github.com/minio/pkg/v2/env"
-	xnet "github.com/minio/pkg/v2/net"
-	"github.com/minio/pkg/v2/policy"
+	"github.com/minio/pkg/v3/env"
+	xnet "github.com/minio/pkg/v3/net"
+	"github.com/minio/pkg/v3/policy"
 )
 
 // OpenID keys and envs.

internal/config/identity/openid/providercfg.go

@@ -28,7 +28,7 @@ import (
 	"github.com/minio/minio/internal/config"
 	"github.com/minio/minio/internal/config/identity/openid/provider"
 	xhttp "github.com/minio/minio/internal/http"
-	xnet "github.com/minio/pkg/v2/net"
+	xnet "github.com/minio/pkg/v3/net"
 )
 
 type providerCfg struct {