chore: reduce block ingestion instruction limit from 2B to 1B #1206

Job	Run time
canister-build-reproducibility	3m 43s
rustfmt	16s
cargo-clippy	1m 28s
cargo-build (ubuntu-20.04)	4m 9s
cargo-build (macos-12)	11m 54s
ShellCheck	5s
cycles_burn	2m 12s
benchmark	4m 16s
cargo-tests (ubuntu-20.04)	24m 46s
cargo-tests (macos-12)	25m 2s
charge-cycles-on-reject	2m 29s
e2e-disable-api-if-not-fully-synced-flag	2m 58s
e2e-scenario-1	2m 42s
e2e-scenario-2	2m 30s
e2e-scenario-3	2m 29s
set_config	2m 10s
upgradability	2m 21s
watchdog_health_status	2m 31s
watchdog_metrics	2m 28s
watchdog_get_config	4m 5s
watchdog_upgradability	2m 56s
checks-pass	1s
	1h 47m 31s

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