array tests: handle different hexdigests from zlib-ng (#1678)

As explained in the issue, zlib-ng produces different hex digests
from original zlib. This adjusts the tests slightly to allow for
this.

Signed-off-by: Adam Williamson <[email protected]>

Author: AdamWill

.github/workflows/python-package.yml

@@ -17,6 +17,7 @@ jobs:
       matrix:
         python-version: ['3.10', '3.11', '3.12']
         numpy_version: ['>=2.1', '==1.24.*']
+        zlib: ['', 'zlib-ng']
         exclude:
           - python-version: '3.12'
             numpy_version: '==1.24.*'
@@ -50,7 +51,7 @@ jobs:
     - name: Create Conda environment with the rights deps
       shell: "bash -l {0}"
       run: |
-        conda create -n zarr-env python==${{matrix.python-version}} bsddb3 pip nodejs
+        conda create -n zarr-env python==${{matrix.python-version}} bsddb3 pip nodejs ${{matrix.zlib}}
         conda activate zarr-env
         npm install -g azurite
     - name: Install dependencies