Chore: Move ReqContext to contexthandler service (#62102)

* Chore: Move ReqContext to contexthandler service

* Rename package to contextmodel

* Generate ngalert files

* Remove unused imports

pkg/api/pluginproxy/pluginproxy.go

@@ -8,8 +8,8 @@ import (
 	"net/url"
 
 	"github.com/grafana/grafana/pkg/infra/tracing"
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
+	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
 	"github.com/grafana/grafana/pkg/services/pluginsettings"
 	"github.com/grafana/grafana/pkg/services/secrets"
 	"github.com/grafana/grafana/pkg/setting"
@@ -22,7 +22,7 @@ import (
 type PluginProxy struct {
 	ps             *pluginsettings.DTO
 	pluginRoutes   []*plugins.Route
-	ctx            *models.ReqContext
+	ctx            *contextmodel.ReqContext
 	proxyPath      string
 	matchedRoute   *plugins.Route
 	cfg            *setting.Cfg
@@ -32,7 +32,7 @@ type PluginProxy struct {
 }
 
 // NewPluginProxy creates a plugin proxy.
-func NewPluginProxy(ps *pluginsettings.DTO, routes []*plugins.Route, ctx *models.ReqContext,
+func NewPluginProxy(ps *pluginsettings.DTO, routes []*plugins.Route, ctx *contextmodel.ReqContext,
 	proxyPath string, cfg *setting.Cfg, secretsService secrets.Service, tracer tracing.Tracer,
 	transport *http.Transport) (*PluginProxy, error) {
 	return &PluginProxy{