bug#58785: guix import crate -r zellij fails

[Abhishek Cherath <abhi@quic.us>]

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Hello,

here's the error:

```
guix/import/crate.scm:283:18: In procedure dependency-name+version:
In procedure struct-vtable: Wrong type argument in position 1 (expecting 
struct): #f
```

I guess the issue is that cranelift-codegen is memoized with (mproc 
"cranelift-codegen" #:version "0.68.0" #:repo #f …) , where repo is 
false. but it seems to have a repo on the page? 
https://crates.io/crates/cranelift-codegen?

I'll try and work towards a fix sometime next month, but I'd be glad
for some pointers.

Thank you,
Abhishek.

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Backtrace:
In guix/import/utils.scm:
   584:33 19 (lookup-node "cranelift-codegen" "0.68.0")
In guix/memoization.scm:
     98:0 18 (mproc "cranelift-codegen" #:version "0.68.0" #:repo #f …)
In unknown file:
          17 (_ #<procedure 7fe03a96c720 at guix/memoization.scm:17…> …)
In guix/import/crate.scm:
   300:28 16 (crate->guix-package "cranelift-codegen" #:version _ # _ …)
   292:10 15 (sort-map-dependencies _)
In srfi/srfi-1.scm:
   586:29 14 (map1 _)
   586:29 13 (map1 _)
   586:29 12 (map1 _)
   586:29 11 (map1 _)
   586:29 10 (map1 _)
   586:29  9 (map1 _)
   586:29  8 (map1 _)
   586:29  7 (map1 _)
   586:29  6 (map1 _)
   586:29  5 (map1 _)
   586:29  4 (map1 _)
   586:29  3 (map1 _)
   586:29  2 (map1 _)
   586:17  1 (map1 (#<<crate-dependency> id: "peepmatic" kind: no…> …))
In guix/import/crate.scm:
   283:18  0 (dependency-name+version _)