Fix HasOneSql their field update hook #1037
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The hook was updating our model using SQL query, which was dangerous as all validation/normalization/hooks were skipped. I checked the rest of the atk4/data code, and thankfully, all similar dangerous updates were already migrated to materiazed update.
One of dangerous behaviour was described in atk4/filestore#26.
The hook conditions are still not right and I will fix them in another PR. Thus this PR does not fix the filestore issue, but prevents any related data corruption to happen - if mismatched data are given, an exception is thrown.