[v11.3.x] CI: Support more version formats in publishing (#94750)

CI: Support more version formats in publishing (#94575)

* cleanup dead code
* add tests and rewrite publish grafanacom steps to reuse
* add pkg/build tests; don't upload CDN assets on grafana releases

(cherry picked from commit 7a2edd35d5)

pkg/build/cmd.go

@@ -11,6 +11,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/urfave/cli/v2"
 )
 
 const (
@@ -30,6 +32,12 @@ func logError(message string, err error) int {
 	return 1
 }
 
+func RunCmdCLI(c *cli.Context) error {
+	os.Exit(RunCmd())
+
+	return nil
+}
+
 // RunCmd runs the build command and returns the exit code
 func RunCmd() int {
 	opts := BuildOptsFromFlags()