soroban-rpc: Allow Budget Instruction Leeway to be Configured by Clients #3089

Job	Run time
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 27s
Integration tests (ubuntu-20.04, 1.21, .CLI.)	12m 5s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	3m 10s
Integration tests (ubuntu-20.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	13m 24s
Build (macos-latest, x86_64-apple-darwin, amd64)	6m 7s
Build (macos-latest, aarch64-apple-darwin, arm64)	4m 28s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	9m 8s
Unit tests (ubuntu-20.04, 1.21)	6m 45s
	57m 34s

Provide feedback