[Repo Assist] tests: add GenerativePropertiesTests; prepare release 8.6.0#504

dsyme merged 2 commits intomasterfsprojects/FSharp.TypeProviders.SDK:masterfrom

repo-assist/tests-properties-release-8-6-20260415-29b70356b30900c0fsprojects/FSharp.TypeProviders.SDK:repo-assist/tests-properties-release-8-6-20260415-29b70356b30900c0Copy head branch name to clipboard