Upgrade to cortex v1.21.0

Signed-off-by: Friedrich Gonzalez <1517449+friedrichg@users.noreply.github.com>

Author: friedrichg

.github/workflows/validate_pr.yml

@@ -12,20 +12,20 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.23
+          go-version: 1.25
           cache: false
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.64
+          version: v1.64.8
   unit_tests:
     name: Unit-Tests
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.23
+          go-version: 1.25
       - name: Unit Tests
         run: make test
   build:
@@ -35,6 +35,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.23
+          go-version: 1.25
       - name: Build All
         run: make all

go.mod

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/prometheus/common/model"
 	"github.com/prometheus/prometheus/model/rulefmt"
 	"github.com/prometheus/prometheus/promql/parser"
 	log "github.com/sirupsen/logrus"
@@ -234,7 +235,7 @@ func (r RuleNamespace) Validate() []error {
 func ValidateRuleGroup(g rwrulefmt.RuleGroup) []error {
 	var errs []error
 	for _, r := range g.Rules {
-		for _, we := range r.Validate(rulefmt.RuleNode{}) {
+		for _, we := range r.Validate(rulefmt.RuleNode{}, model.LegacyValidation) {
 			errs = append(errs, fmt.Errorf("group %q, rule %q: %s", g.Name, getRuleName(r), we.Error()))
 		}
 	}