r-ps: fix build error

```
    Traceback (most recent call last):
      File "/usr/lib/python3.11/site-packages/lilac2/worker.py", line 216, in main
        with load_lilac(Path('.')) as mod:
      File "/usr/lib/python3.11/contextlib.py", line 137, in __enter__
        return next(self.gen)
               ^^^^^^^^^^^^^^
      File "/usr/lib/python3.11/site-packages/lilac2/lilacpy.py", line 46, in load_lilac
        spec.loader.exec_module(mod)
      File "<frozen importlib._bootstrap_external>", line 940, in exec_module
      File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
      File "/usr/share/lilac/Packages/BioArchLinux/r-ps/lilac.py", line 7, in <module>
        from lilac_r_utils import r_pre_build
      File "/usr/share/lilac/Packages/lilac-extensions/lilac_r_utils.py", line 2, in <module>
        from lilaclib import _G, edit_file, run_protected
    ImportError: cannot import name '_G' from 'lilaclib' (/usr/lib/python3.11/site-packages/lilaclib.py)
```

BioArchLinux/r-fs/lilac.py

@@ -8,6 +8,7 @@ from lilac_r_utils import r_pre_build
 
 def pre_build():
     r_pre_build(
+        _G,
         expect_systemrequirements = "GNU make",
     )
 

BioArchLinux/r-ps/lilac.py

@@ -7,7 +7,7 @@ sys.path.append(os.path.normpath(f'{__file__}/../../../lilac-extensions'))
 from lilac_r_utils import r_pre_build
 
 def pre_build():
-    r_pre_build()
+    r_pre_build(_G)
 
 def post_build():
     git_pkgbuild_commit()

BioArchLinux/r-ps/lilac.yaml

@@ -6,4 +6,4 @@ update_on:
   cran: ps
 - alias: r
 - source: manual
-  manual: 1
+  manual: 2

lilac-extensions/lilac_r_utils.py

@@ -1,9 +1,10 @@
 from lilac2.const import PACMAN_DB_DIR
-from lilaclib import _G, edit_file, run_protected
+from lilaclib import edit_file, run_protected
 import pyalpm
 import tarfile
+from types import SimpleNamespace
 
-def r_update_pkgver_and_pkgrel():
+def r_update_pkgver_and_pkgrel(_G: SimpleNamespace):
     """
     Update _pkgver and pkgrel used in R packages.
 
@@ -320,7 +321,7 @@ all_checks = [
     check_arch,
 ]
 
-def r_check_pkgbuild(cfg: CheckConfig):
+def r_check_pkgbuild(_G: SimpleNamespace, cfg: CheckConfig):
     pkgbuild = Pkgbuild()
     cfg.default_r_pkgs = get_default_r_pkgs()
     errors = []
@@ -337,8 +338,8 @@ def r_check_pkgbuild(cfg: CheckConfig):
         errors = '\n'.join(errors)
         raise CheckFailed(f"Check failed:\n{errors}")
 
-def r_pre_build(**kwargs):
+def r_pre_build(_G: SimpleNamespace, **kwargs):
     cfg = CheckConfig(**kwargs)
-    r_update_pkgver_and_pkgrel()
+    r_update_pkgver_and_pkgrel(_G)
     run_protected(["updpkgsums"])
-    r_check_pkgbuild(cfg)
+    r_check_pkgbuild(_G, cfg)