[Epic] Separating soroban-rpc to prepare for repo change #3275

Job	Run time
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 20s
Integration tests (ubuntu-20.04, 1.21, .CLI.)	20m 17s
Unit tests (ubuntu-20.04, 1.21)	7m 37s
Integration tests (ubuntu-20.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	17m 14s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	2m 45s
Unit tests (ubuntu-22.04, 1.21)	7m 48s
Build (macos-latest, x86_64-apple-darwin, amd64)	6m 20s
Integration tests (ubuntu-22.04, 1.21, .CLI.)	20m 14s
Build (macos-latest, aarch64-apple-darwin, arm64)	6m 14s
Integration tests (ubuntu-22.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	17m 7s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	7m 55s
	1h 55m 51s

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