merge Clippy error fixes and empty orders validation diffs #119

Job	Run time
toml-fmt	10m 43s
build-test (offchain-worker, offchain-worker, ubuntu-latest, SW, dcap)	1h 10m 2s
code-quality (cargo clippy --release -- -D warnings)	7m 9s
Cancel Previous Runs	3s
code-quality (cargo clippy --release --features evm -- -D warnings)	12m 43s
code-quality (cargo clippy --release --features sidechain -- -D warnings)	7m 14s
code-quality (cargo clippy --release --features teeracle -- -D warnings)	7m 21s
code-quality (cargo clippy --release --features offchain-worker -- -D warnings)	19m 3s
code-quality (cd enclave-runtime && cargo clippy -- -D warnings)	10m 41s
code-quality (cd enclave-runtime && cargo clippy --features evm -- -D warnings)	9m 18s
code-quality (cd enclave-runtime && cargo clippy --features sidechain -- -D warnings)	7m 13s
code-quality (cd enclave-runtime && cargo clippy --features teeracle -- -D warnings)	4m 29s
code-quality (cd enclave-runtime && cargo clippy --features offchain-worker -- -D warnings)	5m 35s
code-quality (cargo fmt --all -- --check)	2m 19s
code-quality (cd enclave-runtime && cargo fmt --all -- --check)	2m 39s
integration-tests (M6, offchain-worker, demo-indirect-invocation, ubuntu-latest, SW)	17m 11s
Release Build of teeracle	0s
Draft Release	0s
	3h 13m 43s

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