Fix OrderedDict regression

[Hoxbro]

PR #5890 which changed OrderedDict to dict. had a regression which was discovered in hvplot holoviz/hvplot#1164

[Hoxbro]

This fix is not well received by our test suite.

Have to find the underlying issue.

[Hoxbro]

An example with hvplot

import geoviews as gv
import xarray as xr
from holoviews.operation import contours

gv.extension("bokeh")

ds = xr.tutorial.open_dataset("air_temperature").isel(time=0)

p1 = gv.QuadMesh(ds, kdims=["lon", "lat"])
p2 = contours(p1, filled=True)
p2

[codecov-commenter]

Codecov Report

Merging #5925 (afbf46e) into main (8ba691a) will decrease coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5925      +/-   ##
==========================================
- Coverage   88.45%   88.32%   -0.14%     
==========================================
  Files         313      313              
  Lines       65209    65209              
==========================================
- Hits        57683    57595      -88     
- Misses       7526     7614      +88     

Flag	Coverage Δ
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Files	Coverage Δ
holoviews/core/data/dictionary.py	90.90% <100.00%> (+0.31%)	⬆️

... and 5 files with indirect coverage changes

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[Hoxbro]

It's not an ideal fix, but it no longer errors in our CI or the example above.