TST: test_coordinate_operation_grids__alternative_grid_name - handle when PROJ 9.1 and local grid exists

[snowman2]

Related: #1080 #1090

https://github.com/pyproj4/pyproj/runs/8198324186

    @pytest.mark.grid
    def test_coordinate_operation_grids__alternative_grid_name():
...
        if PROJ_GTE_91 and pyproj.network.is_network_enabled():
            assert grid.available is True
>           assert grid.full_name == ""
E           AssertionError: assert '/home/runner..._ntv1_can.tif' == ''
E             + /home/runner/.local/share/proj/ca_nrc_nt

[codecov]

Codecov Report

Merging #1130 (7155776) into main (f0ce3ff) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1130   +/-   ##
=======================================
  Coverage   96.16%   96.16%           
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  Files          20       20           
  Lines        1798     1798           
=======================================
  Hits         1729     1729           
  Misses         69       69           

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