tests: add testBoot parameter to disable boot tests

tests/lib.nix

@@ -13,6 +13,7 @@
     , efi ? true
     , enableOCR ? false
     , testMode ? "direct" # can be one of direct module cli
+    , testBoot ? true # if we actually want to test booting or just create/mount
     }:
     let
       lib = pkgs.lib;
@@ -141,6 +142,7 @@
           machine.succeed("${tsp-mount}") # verify that the command is idempotent
         ''}
 
+        ${lib.optionalString testBoot ''
           # mount nix-store in /mnt
           machine.succeed("mkdir -p /mnt/nix/store")
           machine.succeed("mount --bind /nix/store /mnt/nix/store")
@@ -161,6 +163,8 @@
           machine.start()
           ${bootCommands}
           machine.wait_for_unit("local-fs.target")
+        ''}
+
         ${extraTestScript}
       '';
     };