Extend transactions with memo sections #6813

Job	Run time
namada-release (ubuntu-latest, 2.4.0, ABCI Release build)	10m 15s
build-wasm (ubuntu-latest, v2, 2.4.0)	4m 47s
upload-wasm (ubuntu-latest, v2, nightly-2023-06-01, 2.4.0)	12s
test-wasm (ubuntu-latest, v2, nightly-2023-06-01, 2.4.0)	8m 16s
test-unit (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	17m 54s
run-benchmarks (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	36m 23s
test-integration (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	4m 44s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta6, 0)	12m 40s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta6, 1)	10m 27s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta6, 2)	8m 58s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta6, 3)	15m 7s
	2h 9m 43s

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