`cosmossdk.io/collections` doesn't have time.Time codec

[islishude]

Should it move to collections packages now?

cosmos-sdk/types/collections.go

Lines 41 to 46 in 346c59f

	// TimeKey represents a collections.KeyCodec to work with time.Time
	//
	// Deprecated: exists only for state compatibility reasons, should not
	// be used for new storage keys using time. Please use the time KeyCodec
	// provided in the collections package.
	TimeKey collcodec.KeyCodec[time.Time] = timeKeyCodec{}

[linear]

SDK-431