Make consolidate_metadata for DirectoryStore following symlinks

[joshmoore]

Thanks, @ctamluu. I've triggered the workshops. Can you perhaps update the description with some background information on what you are trying to achieve? Is there an example fileset somewhere that we could take a look at?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.98%. Comparing base (0855bd6) to head (4464b37).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2063 +/- ## ========================================== - Coverage 99.98% 99.98% -0.01% ========================================== Files 38 38 Lines 14703 14700 -3 ========================================== - Hits 14701 14698 -3 Misses 2 2 ``` | [Files](https://app.codecov.io/gh/zarr-developers/zarr-python/pull/2063?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zarr-developers) | Coverage Δ | | |---|---|---| | [zarr/storage.py](https://app.codecov.io/gh/zarr-developers/zarr-python/pull/2063?src=pr&el=tree&filepath=zarr%2Fstorage.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zarr-developers#diff-emFyci9zdG9yYWdlLnB5) | `100.00% <100.00%> (ø)` | | | [zarr/tests/test\_storage.py](https://app.codecov.io/gh/zarr-developers/zarr-python/pull/2063?src=pr&el=tree&filepath=zarr%2Ftests%2Ftest_storage.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zarr-developers#diff-emFyci90ZXN0cy90ZXN0X3N0b3JhZ2UucHk=) | `100.00% <100.00%> (ø)` | | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/zarr-developers/zarr-python/pull/2063/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zarr-developers)