gnu: Add updater input properties for R and Python packages.

* gnu/packages/cran.scm (r-glue, r-xfun, r-vctrs)
(r-lifecycle): Turn comment about r-knitr into 'properties' field.
* gnu/packages/mpi.scm (python-mpi4py)[properties]: New field.

gnu/packages/cran.scm

@@ -5091,11 +5091,10 @@ (define-public r-glue
         (base32
          "1gzxk5jgdh2xq9r7z09xs306ygzf27vhg3pyfl7ck1755gqii9cx"))))
     (build-system r-build-system)
-    ;; knitr depends on glue, so we can't add knitr here to build the
-    ;; vignettes.
-    #;
-    (native-inputs
-     `(("r-knitr" ,r-knitr)))
+    (properties
+     ;; knitr depends on glue, so we can't add knitr here to build the
+     ;; vignettes.
+     '((updater-ignored-native-inputs . ("r-knitr"))))
     (home-page "https://github.com/tidyverse/glue")
     (synopsis "Interpreted string literals")
     (description
@@ -8782,10 +8781,9 @@ (define-public r-xfun
        (sha256
         (base32 "1jan2ggfywm1g05zszyy8d492wj7vpy35682lrnlklrx4jxsmv6h"))))
     (build-system r-build-system)
-    ;; knitr itself depends on xfun
-    #;
-    (native-inputs
-     `(("r-knitr" ,r-knitr)))
+    (properties
+     ;; knitr itself depends on xfun
+     '((updater-ignored-native-inputs . ("r-knitr"))))
     (home-page "https://github.com/yihui/xfun")
     (synopsis "Miscellaneous functions")
     (description
@@ -8872,11 +8870,10 @@ (define-public r-vctrs
     (build-system r-build-system)
     (propagated-inputs
      (list r-cli r-glue r-lifecycle r-rlang))
-    ;; We can't have r-knitr among the inputs here, because r-vctrs ends up
-    ;; being an eventual input to r-knitr.
-    #;
-    (native-inputs
-     (list r-knitr))
+    (properties
+     ;; We can't have r-knitr among the inputs here, because r-vctrs ends up
+     ;; being an eventual input to r-knitr.
+     '((updater-ignored-native-inputs . ("r-knitr"))))
     (home-page "https://github.com/r-lib/vctrs")
     (synopsis "Vector helpers")
     (description
@@ -25256,15 +25253,14 @@ (define-public r-lifecycle
        (sha256
         (base32
          "1hk9mblhap429fk77qpgc4hv0j91q5wpahi0y76w118m471zsnb4"))))
-    (properties `((upstream-name . "lifecycle")))
     (build-system r-build-system)
     (propagated-inputs
      (list r-cli r-glue r-rlang))
-    ;; We can't add this here because via r-stringr this package ends up being
-    ;; an input to r-knitr.
-    #;
-    (native-inputs
-     (list r-knitr)) ; for vignettes
+    (properties
+     ;; We can't add this here because via r-stringr this package ends up
+     ;; being an input to r-knitr.
+     '((updater-ignored-native-inputs . ("r-knitr"))
+       (upstream-name . "lifecycle")))
     (home-page "https://github.com/r-lib/lifecycle")
     (synopsis "Manage the life cycle of your package functions")
     (description

gnu/packages/mpi.scm

@@ -422,6 +422,8 @@ (define-public python-mpi4py
              #t)))))
     (inputs
      (list openmpi))
+    (properties
+     '((updater-extra-inputs . ("openmpi"))))
     (home-page "https://github.com/mpi4py/mpi4py")
     (synopsis "Python bindings for the Message Passing Interface standard")
     (description "MPI for Python (mpi4py) provides bindings of the Message