guix build, archive, graph: Disable absolute file port name canonicalization.

guix build, archive, graph: Disable absolute file port name canonicalization.

This avoids an 'lstat' storm.  Specifically:

  ./pre-inst-env strace -c guix build -nd libreoffice

goes from 1,711 to 214 'lstat' calls.

* guix/scripts/build.scm (options->things-to-build): When SPEC matches
'derivation-path?', call 'canonicalize-path'.
(guix-build): Remove 'with-fluids' for %FILE-PORT-NAME-CANONICALIZATION.
* guix/scripts/archive.scm (guix-archive): Remove 'with-fluids' for
%FILE-PORT-NAME-CANONICALIZATION.
* guix/scripts/graph.scm (guix-graph): Likewise.