Optimize compilation speed and memory consumption (`DeclEngine`) (#7659) #26979

Job	Run time
build-sway-lib-std	1m 56s
check-forc-manifest-version	23s
build-reference-examples	53s
check-dependency-version-formats	32s
forc-pkg-fuels-deps-check	20s
cargo-toml-fmt-check	28s
cargo-unused-deps-check	5m 2s
forc-fmt-check-sway-lib-std	1m 18s
check-sdk-harness-test-suite-compatibility	44s
cargo-clippy	1m 0s
build-forc-doc-sway-lib-std	5m 6s
forc-fmt-check-panic	2m 30s
cargo-fmt-check	17s
forc-run-benchmarks	4m 58s
build-mdbook	9m 57s
get-fuel-core-version	47s
forc-fmt-check-sway-examples	57s
cargo-test-lib-std	9m 32s
build-sway-examples	57s
cargo-build-workspace	1m 5s
pre-publish-check	-1s
forc-unit-tests	25m 26s
cargo-run-e2e-test-release	7m 0s
Build and test various forc tools (cargo test --locked --release -p forc -- --nocapture)	2m 25s
Build and test various forc tools (cargo test --locked --release -p forc-debug)	6m 46s
Build and test various forc tools (cargo test --locked --release --workspace --exclude forc-debug...	6m 34s
cargo-run-e2e-test	9m 50s
Build and test various forc tools (cargo nextest run --locked --release -p sway-lsp --no-capture ...	8m 45s
notify-slack-on-failure	4s
publish	-1s
publish-sway-lib-std	0s
Build and upload forc binaries to release	-1s
verifications-complete	-1s
	1h 55m 28s

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