`buck2 audit output` and `ctx.audit().output(...)` do not support toolchain-deps' paths

[lf-]

Throw this (admittedly somewhat contrived and using a made-up path copy pasted from another project) bxl into //test.bxl:

def _inspect_path(ctx: bxl.Context):
    audit = ctx.audit()
    out = audit.output("buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f7478adf1e00e/__haskell__/__action___0__/th-expand-syns/out.link")

main = bxl.main(
    impl = _inspect_path,
    cli_args = {},
)

Output:

$ buck2 bxl //test.bxl:main
File changed: gh_facebook_buck2//test.bxl
Traceback (most recent call last):
  File <builtin>, in <module>
  * test.bxl:3, in _inspect_path
      out = audit.output("buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f74...

error: Malformed buck-out path. Expected format: `buck-out/<isolation_prefix>/<gen|tmp|test|gen-anon|gen-bxl>/<cell_name>/<cfg_hash>/<target_path?>/__<target_name>__/<__action__i
d__?>/<outputs>`. Actual path was: `buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f7478adf1e00e/__haskell__/__action___0__/th-expand-syns/out.link`
 --> test.bxl:3:11
  |
3 |     out = audit.output("buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f7478adf1e00e/__haskell__/__action___0__/th-expand-syns/out.link")
  |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |

Caused by:
    Path does not have a platform configuration or content-based hash
Build ID: f3945808-c611-4857-a063-ed4340af82c9
Command: bxl.                                                                                                                                                                    
Time elapsed: 0.0s
BXL FAILED

$ buck2 audit output buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f7478adf1e00e/__haskell__/__action___0__/th-expand-syns/out.link
Malformed buck-out path. Expected format: `buck-out/<isolation_prefix>/<gen|tmp|test|gen-anon|gen-bxl>/<cell_name>/<cfg_hash>/<target_path?>/__<target_name>__/<__action__id__?>/<
outputs>`. Actual path was: `buck-out/v2/gen/gh_facebook_buck2/bef66bd6acb1c0aa-5c5f7478adf1e00e/__haskell__/__action___0__/th-expand-syns/out.link`

Caused by:
    Path does not have a platform configuration or content-based hash
Build ID: 68142a87-1d72-4a2f-8232-cbd4bc699605
Command: audit.                                                                                                                                                                  
Time elapsed: 0.0s

I would expect that audit output knows how to deal with toolchain deps that have these two platforms. It seems that the parser code isn't expecting the same format as the creation code.

Version:
a72a88b