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

packaging/deb/systemd/grafana-server.service

@@ -14,15 +14,14 @@ Restart=on-failure
 WorkingDirectory=/usr/share/grafana
 RuntimeDirectory=grafana
 RuntimeDirectoryMode=0750
-ExecStart=/usr/sbin/grafana-server                                                  \
+ExecStart=/usr/share/grafana/bin/grafana server                                     \
                             --config=${CONF_FILE}                                   \
                             --pidfile=${PID_FILE_DIR}/grafana-server.pid            \
                             --packaging=deb                                         \
                             cfg:default.paths.logs=${LOG_DIR}                       \
                             cfg:default.paths.data=${DATA_DIR}                      \
                             cfg:default.paths.plugins=${PLUGINS_DIR}                \
-                            cfg:default.paths.provisioning=${PROVISIONING_CFG_DIR}  
-
+                            cfg:default.paths.provisioning=${PROVISIONING_CFG_DIR}
 
 LimitNOFILE=10000
 TimeoutStopSec=20