scripts/snap_build.sh: remove --destructive-mode #2629

Job	Run time
macOS--dotnet6-only	6m 5s
macOS--dotnet6-and-mono	6m 43s
macOS--mono-only	16m 9s
windows--dotnet6-and-legacyFramework	6m 48s
windows--legacyFramework-only	8m 53s
linux22-github--dotnet-and-mono	4m 17s
linux22-github--dotnet-and-newmono	4m 42s
linux22-vanilla--stockmono-only	5m 53s
windows--dotnet6-only	7m 16s
linux22-vanilla--stockdotnet6-and-newmono	7m 43s
linux22-vanilla--stockdotnet6-and-stockmono	6m 26s
linux22-vanilla--stockdotnet6-only	6m 4s
linux20-github--dotnet-and-mono	4m 2s
linux20-github--dotnet-and-newmono	4m 21s
linux20-vanilla--newmono-only	11m 32s
linux20-vanilla--stockmono-only	6m 2s
linux22-vanilla--newmono-only	8m 59s
conventions	1m 18s
snap_pkg	7m 47s
	2h 11m 0s

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