chore: reduce block ingestion instruction limit from 2B to 1B #1207

Job	Run time
cargo-clippy	28s
canister-build-reproducibility	3m 23s
cargo-build (ubuntu-20.04)	4m 4s
cargo-build (macos-12)	2m 31s
rustfmt	17s
ShellCheck	6s
cycles_burn	2m 14s
cargo-tests (ubuntu-20.04)	3m 52s
charge-cycles-on-reject	2m 26s
cargo-tests (macos-12)	5m 49s
benchmark	2m 57s
e2e-disable-api-if-not-fully-synced-flag	2m 41s
e2e-scenario-3	2m 14s
e2e-scenario-2	2m 32s
e2e-scenario-1	2m 47s
set_config	2m 17s
upgradability	2m 19s
watchdog_get_config	2m 32s
watchdog_health_status	2m 45s
watchdog_metrics	2m 35s
watchdog_upgradability	3m 16s
checks-pass	1s
	54m 6s

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