vagrant: ubuntu lunar -> noble VM

Noble should become stable / LTS soon.

Vagrantfile

@@ -275,16 +275,16 @@ Vagrant.configure(2) do |config|
     v.cpus = $cpus
   end
 
-  config.vm.define "lunar64" do |b|
-    b.vm.box = "ubuntu/lunar64"
+  config.vm.define "noble64" do |b|
+    b.vm.box = "ubuntu/noble64"
     b.vm.provider :virtualbox do |v|
       v.memory = 1024 + $wmem
     end
     b.vm.provision "fs init", :type => :shell, :inline => fs_init("vagrant")
     b.vm.provision "packages debianoid", :type => :shell, :inline => packages_debianoid("vagrant")
-    b.vm.provision "build env", :type => :shell, :privileged => false, :inline => build_sys_venv("lunar64")
+    b.vm.provision "build env", :type => :shell, :privileged => false, :inline => build_sys_venv("noble64")
     b.vm.provision "install borg", :type => :shell, :privileged => false, :inline => install_borg("llfuse")
-    b.vm.provision "run tests", :type => :shell, :privileged => false, :inline => run_tests("lunar64", ".*none.*")
+    b.vm.provision "run tests", :type => :shell, :privileged => false, :inline => run_tests("noble64", ".*none.*")
   end
 
   config.vm.define "jammy64" do |b|