hot fix v20.0.2, increased preflight instruction fee padding to 3 million #3077

Job	Run time
Unit tests (ubuntu-20.04, 1.21)	5m 3s
Integration tests (ubuntu-20.04, 1.21, .CLI.)	14m 8s
Build (ubuntu-latest, x86_64-unknown-linux-gnu, amd64)	2m 28s
Integration tests (ubuntu-20.04, 1.21, ^Test(([^C])\|(C[^L])\|(CL[^I])).*$)	12m 13s
Build (ubuntu-latest, aarch64-unknown-linux-gnu, arm64)	3m 2s
Build (macos-latest, x86_64-apple-darwin, amd64)	4m 53s
Build (macos-latest, aarch64-apple-darwin, arm64)	4m 22s
Build (windows-latest, x86_64-pc-windows-gnu, amd64)	6m 10s
	52m 19s

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