Prometheus api uses grafana/regexp now

When initializing v1.NewAPI we're passing a compiled Regexp that
unmatches the expected type becuase we were importing "regexp" instead
of "github.com/grafana/regexp".

This commit makes it consistent by replacing "regexp" with
"github.com/grafana/regexp" and updating go mod.

Signed-off-by: Jesus Vazquez <jesus.vazquez@grafana.com>

go.mod

@@ -57,6 +57,7 @@ require (
 	github.com/alecthomas/chroma v0.10.0
 	github.com/google/go-github/v32 v32.1.0
 	github.com/grafana-tools/sdk v0.0.0-20211220201350-966b3088eec9
+	github.com/grafana/regexp v0.0.0-20220304095617-2e8d9baf4ac2
 	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
@@ -138,7 +139,6 @@ require (
 	github.com/googleapis/gax-go/v2 v2.2.0 // indirect
 	github.com/gopherjs/gopherjs v0.0.0-20191106031601-ce3c9ade29de // indirect
 	github.com/gosimple/slug v1.1.1 // indirect
-	github.com/grafana/regexp v0.0.0-20220304095617-2e8d9baf4ac2 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.0-rc.2.0.20201207153454-9f6bf00c00a7 // indirect
 	github.com/hashicorp/consul/api v1.12.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect

pkg/api/handlers.go

@@ -11,12 +11,12 @@ import (
 	"html/template"
 	"net/http"
 	"path"
-	"regexp"
 	"sort"
 	"sync"
 
 	"github.com/go-kit/log"
 	"github.com/gorilla/mux"
+	"github.com/grafana/regexp"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"

pkg/querier/error_translate_queryable_test.go

@@ -10,11 +10,11 @@ import (
 	"fmt"
 	"net/http"
 	"net/http/httptest"
-	"regexp"
 	"testing"
 	"time"
 
 	"github.com/go-kit/log"
+	"github.com/grafana/regexp"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/route"