soroban-rpc: Add common retention window for events and transactions. #3210

Job	Run time
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 16s
Integration tests (ubuntu-20.04, 1.21, .CLI.)	20m 49s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	2m 48s
Integration tests (ubuntu-20.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	17m 41s
Build (macos-latest, x86_64-apple-darwin, amd64)	4m 59s
Unit tests (ubuntu-20.04, 1.21)	7m 26s
Integration tests (ubuntu-22.04, 1.21, .CLI.)	20m 20s
Build (macos-latest, aarch64-apple-darwin, arm64)	4m 31s
Integration tests (ubuntu-22.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	17m 0s
Unit tests (ubuntu-22.04, 1.21)	7m 33s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	8m 47s
	1h 54m 10s

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