Set GO111MODULE=on for go.work view

GO111MODULE=auto disables modules when go tool sees only go.work file.

$ go version
go version go1.23.1 linux/amd64
$ echo 'go 1.24' > go.work
$ go version
go version go1.24.0 linux/amd64
$ GO111MODULE=auto go version
go version go1.23.1 linux/amd64

When go in $PATH is too old this breaks gopls for repositories like this:
https://github.com/containers/container-libs/

Signed-off-by: Konstantin Khlebnikov <[email protected]>

Author: koct9i

gopls/internal/cache/view.go

@@ -243,6 +243,9 @@ func (d viewDefinition) adjustedGO111MODULE() string {
 	if d.folder.Env.GO111MODULE != "" {
 		return d.folder.Env.GO111MODULE
 	}
+	if d.typ == GoWorkView {
+		return "on"
+	}
 	return "auto"
 }