Server: Switch from separate server & cli to a unified grafana binary (#58286)

* avoid the need for a second bulky binary for grafana-cli

* look for grafana-server in $PATH as well as same directory

* implement unified "grafana" command

* update dockerfiles, fix grafana-cli -v

* update packaging to work with single binary

- add wrapper scripts for grafana and grafana-server
- update and sync package files
- implement --sign flag of build package command
- stop packaging scripts folder, they are not useful for end users
- add support for --configOverrides in server command
- remove unused nfpm.yaml config file

* windows support

pkg/cmd/grafana-cli/main.go

@@ -3,12 +3,9 @@ package main
 import (
 	"os"
 
-	"github.com/grafana/grafana/pkg/cmd/grafana-cli/commands"
+	"github.com/grafana/grafana/pkg/util/cmd"
 )
 
-// Version is overridden by build flags
-var version = "main"
-
 func main() {
-	os.Exit(commands.RunCLI(version))
+	os.Exit(cmd.RunGrafanaCmd("cli"))
 }