feat(bindings-ts)!: API change: return `AssembledTransaction`s, require signAndSend, and support multi-auth workflows #2963

Job	Run time
Unit tests (ubuntu-20.04, 1.20.1)	5m 8s
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	4m 15s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	3m 18s
Integration tests (ubuntu-20.04, 1.20.1, .CLI.)	16m 22s
Build (macos-latest, x86_64-apple-darwin, amd64)	7m 16s
Integration tests (ubuntu-20.04, 1.20.1, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	14m 1s
Build (macos-latest, aarch64-apple-darwin, arm64)	4m 59s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	5m 51s
	1h 1m 10s

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