[Epic] Separating soroban-rpc to prepare for repo change #3279

Job	Run time
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 16s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	2m 32s
Integration tests (ubuntu-20.04, 1.21, .CLI.)	14m 52s
Build (macos-latest, x86_64-apple-darwin, amd64)	6m 0s
Integration tests (ubuntu-20.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	12m 55s
Build (macos-latest, aarch64-apple-darwin, arm64)	6m 26s
Integration tests (ubuntu-22.04, 1.21, .CLI.)	15m 8s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	8m 30s
Integration tests (ubuntu-22.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	13m 13s
Unit tests (ubuntu-20.04, 1.21)	6m 18s
Unit tests (ubuntu-22.04, 1.21)	6m 44s
	1h 34m 54s

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