feat(x/fswap): introduce new event(MakeSwapProposal) #4214

Job	Run time
build (amd64, gcc)	34s
cleanup-runs	6s
build (arm64, aarch64-linux-gnu-gcc, g++-aarch64-linux-gnu)	1m 30s
install-tparse	19s
test-cosmovisor	2m 37s
split-test-files	11s
test-race (00)	3m 49s
tests (00)	3m 45s
test-race (01)	3m 18s
tests (01)	4m 43s
test-race (02)	1m 55s
tests (02)	5m 1s
test-race (03)	2m 18s
tests (03)	3m 36s
upload-coverage-report	25s
	34m 7s

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