gitignore: drop runtime state from tracking #2053

Job	Run time
rustfmt	25s
clippy	2m 19s
cargo-check (protocol)	37s
cargo-check (agent-runner)	31s
cargo-check (orchestrator-cli)	1m 56s
cargo-check (orchestrator-core)	54s
cargo-check (orchestrator-web-contracts)	23s
cargo-check (orchestrator-web-api)	1m 11s
cargo-check (orchestrator-web-server)	1m 41s
cargo-check (llm-cli-wrapper)	38s
smoke-help	2m 45s
	13m 20s

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