run: split out polkit ops into separate .c file

Let's shorten an already very long .c file, by splitting it apart a bit.

Splitting out the polkit code is relatively easy, since it does not
touch any of the arg_xyz variables.

src/shared/forward.h

@@ -35,6 +35,7 @@ typedef enum OutputFlags OutputFlags;
 typedef enum OutputMode OutputMode;
 typedef enum PagerFlags PagerFlags;
 typedef enum PatternCompileCase PatternCompileCase;
+typedef enum PolkitFlags PolkitFlags;
 typedef enum RemoveFlags RemoveFlags;
 typedef enum ResolveSupport ResolveSupport;
 typedef enum TPM2Flags TPM2Flags;