feat: reenable buildvcs (#49365)

buildvcs was disabled a few years ago because of compile errors due to missing git objects. This has been resolved so we should reenable it

Author: kruskall

dev-tools/mage/crossbuild.go

@@ -343,7 +343,7 @@ func (b GolangCrossBuilder) Build() error {
 
 	args = append(args,
 		"--rm",
-		"--env", "GOFLAGS=-mod=readonly -buildvcs=false",
+		"--env", "GOFLAGS=-mod=readonly",
 		"--env", "MAGEFILE_VERBOSE="+verbose,
 		"--env", "MAGEFILE_TIMEOUT="+EnvOr("MAGEFILE_TIMEOUT", ""),
 		"--env", fmt.Sprintf("SNAPSHOT=%v", Snapshot),