feat(cketh/ckerc20): consolidate log scrapings #17018

Job	Run time
Bazel Test All	14m 33s
Bazel Build All Config Check	7m 19s
Bazel Build Fuzzers	2m 14s
Bazel Build Fuzzers AFL	4m 53s
Bazel Test macOS Intel	0s
Build IC	22m 47s
Python CI Tests	2m 4s
Cargo Build Release Linux	8m 11s
Cargo Clippy Linux	3m 29s
Build Determinism (//publish/binaries:upload, release, build-ic/release, false)	19s
Build Determinism (//publish/canisters:upload, canisters, build-ic/canisters, false)	16s
Build Determinism (//ic-os/guestos/envs/prod:upload_disk-img, guest-os/update-img, build-ic/icos/...	22s
Build Determinism (//ic-os/hostos/envs/prod:upload_update-img, host-os/update-img, build-ic/icos/...	20s
Build Determinism (//ic-os/setupos/envs/prod:upload_disk-img, setup-os/disk-img, build-ic/icos/se...	15s
	1h 7m 2s

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