[MM-27942] Request arch-specific plugin (#15436)

* request arch-specific plugin

* rename arch/architecture to platform

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/plugin.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"runtime"
 	"sort"
 	"strings"
 	"sync"
@@ -671,6 +672,8 @@ func (a *App) getBaseMarketplaceFilter() *model.MarketplacePluginFilter {
 		filter.BuildEnterpriseReady = true
 	}
 
+	filter.Platform = runtime.GOOS + "-" + runtime.GOARCH
+
 	return filter
 }