Use ICS4Wrapper to send raw IBC packets & fix Fee middleware in wasm …

…stack (backport #1375) (#1379)

* Use ICS4Wrapper to send raw IBC packets & fix Fee in wasm stack

(cherry picked from commit 6dfa5cb)

# Conflicts:
#	app/app.go
#	x/wasm/keeper/handler_plugin.go
#	x/wasm/keeper/keeper_cgo.go
#	x/wasm/keeper/keeper_test.go
#	x/wasm/keeper/options_test.go
#	x/wasm/keeper/test_common.go

* Fix merge conflicts

* Inline ibc packet sender interface and minor chore

* Rename IBCPacketSender

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Co-authored-by: Assaf Morami <assaf.morami@gmail.com>
Co-authored-by: Alex Peters <alpe@users.noreply.github.com>