[client, management, misc] expose VCS revision in dev build version output (#6263)

* Refactor to use a common checker for development version

* Adds commit sha to development version for cobra command only

Leave dashboard unaffected

* Adjust for "v0.31.1-dev" test case

which must be considered pre-release

* Drop synthetic "dev"/"0.50.0-dev" firewall feature-gate fixtures

These test cases encoded the loose strings.Contains(v, "dev")
semantics inherited from peerSupportedFirewallFeatures, but
NetbirdVersion() never produces those values — only the literal
"development" (and now "development-<sha>[-dirty]") ever flows
through the wire. The agent owns the semantics of an ephemeral
development build, so the tests should exercise the strings we
actually emit.

Replaced with development, development-<sha> and
development-<sha>-dirty cases that match the HasPrefix("development")
predicate introduced upstream.

* Remove unexistent tests on wire format

The sha / dirty flag are added only when the CLI asks the version.
Account versions is unaffacted and can only strictly match "development"

* Adds tests for IsDevelopmentVersion

client/cmd/version.go

@@ -12,7 +12,13 @@ var (
 		Short: "Print the NetBird's client application version",
 		Run: func(cmd *cobra.Command, args []string) {
 			cmd.SetOut(cmd.OutOrStdout())
-			cmd.Println(version.NetbirdVersion())
+			out := version.NetbirdVersion()
+			if version.IsDevelopmentVersion(out) {
+				if commit := version.NetbirdCommit(); commit != "" {
+					out += "-" + commit
+				}
+			}
+			cmd.Println(out)
 		},
 	}
 )