feat(x/fswap): introduce new event(MakeSwapProposal) #4215

Job	Run time
cleanup-runs	7s
build (amd64, gcc)	47s
build (arm64, aarch64-linux-gnu-gcc, g++-aarch64-linux-gnu)	1m 20s
install-tparse	9s
split-test-files	15s
test-cosmovisor	2m 55s
test-race (00)	3m 45s
test-race (01)	3m 20s
tests (00)	3m 49s
tests (01)	4m 39s
test-race (02)	2m 5s
test-race (03)	2m 10s
tests (02)	4m 52s
tests (03)	3m 38s
upload-coverage-report	25s
	34m 16s

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