Native: include DeprecatedIn hardfork into usedHardforks

DeprecatedIn hardfork of every native method (if not null) should be
included into the set of used hardforks, otherwise no contract update
will be performed on this hardfork activation:

https://github.com/neo-project/neo/blob/08f2dfc56762bb43be33e873bc3659bad368d4d6/src/Neo/SmartContract/Native/NativeContract.cs#L284

This commit should be a part of #3234 and a part of 3.7.4. Luckily, this new
DeprecatedIn functionality is used only for the old native CryptoLib's
verifyWithECDsa method with Cockatrice hardfork. And luckily, there are other
CryptoLib's methods with ActiveIn set to Cockatrice hardfork. Due to
these two facts this bug does not affect mainnet/testnet, and thus we don't
need 3.7.5 with this fixincluded, so this fix may safely be postponed to 3.8.0.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

src/Neo/SmartContract/Native/NativeContract.cs

@@ -160,6 +160,7 @@ protected NativeContract()
             // Calculate the initializations forks
             usedHardforks =
                 methodDescriptors.Select(u => u.ActiveIn)
+                .Concat(methodDescriptors.Select(u => u.DeprecatedIn))
                 .Concat(eventsDescriptors.Select(u => u.ActiveIn))
                 .Concat(new Hardfork?[] { ActiveIn })
                 .Where(u => u is not null)