chore: make env mode strict by default #20045

Job	Run time
Determine jobs to run	35s
Build Turborepo (ubuntu, self-hosted, linux, x64, metal)	1m 28s
JS Package Tests	0s
Build Turborepo (macos, macos-latest)	4m 3s
Build Turborepo (windows, windows-latest)	10m 9s
Rust lints	54s
Turborepo Examples	0s
Formatting	1m 1s
Turborepo rust check	1m 22s
Turbopack TypeScript files	0s
Check next-swc	0s
Turbopack rust check	0s
Turbopack Rust testing benchmarks on ${{ matrix.os.name }}	0s
Turbopack Rust testing benchmarks on linux	0s
Turbopack rust clippy	0s
Turbopack Rust testing on ubuntu	0s
Turbopack Rust testing on ${{ matrix.os.name }}	0s
Upload Test results	26s
Turborepo Rust testing on ubuntu	2m 13s
Turborepo rust clippy	1m 25s
Turborepo Rust testing on macos	7m 24s
Turborepo Rust testing on windows	17m 8s
Turborepo Integration (ubuntu-latest)	9m 38s
Turborepo Integration (macos-latest)	7m 1s
Turborepo Integration (windows-latest)	27m 28s
Ok	3s
Done	5s
Cleanup / cleanup	2s
	1h 32m 25s

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