add v to version pretty formatter (#8341)

* add v to version pretty formatter

* remove v from json version output

command/version/formatter.go

@@ -38,7 +38,7 @@ func newPrettyFormatter() Formatter {
 
 func (_ *prettyFormatter) Format(info *VersionInfo) (string, error) {
 	var buffer bytes.Buffer
-	buffer.WriteString(fmt.Sprintf("Consul %s\n", info.HumanVersion))
+	buffer.WriteString(fmt.Sprintf("Consul v%s\n", info.HumanVersion))
 	if info.Revision != "" {
 		buffer.WriteString(fmt.Sprintf("Revision %s\n", info.Revision))
 	}

command/version/testdata/pretty.golden

@@ -1,3 +1,3 @@
-Consul 1.99.3-beta1
+Consul v1.99.3-beta1
 Revision 5e5dbedd47a5f875b60e241c5555a9caab595246
 Protocol 2 spoken by default, understands 1 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)