Remove PROFILE forwarding from build.rs

[Jarcho]

compile_test.rs has retrieved the binary path this way for a while now.

changelog: none

[rustbot]

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[samueltardieu]

@Jarcho tests/integration.rs failed: https://github.com/rust-lang/rust-clippy/actions/runs/26574073824/job/78288767825

[samueltardieu]

Suggested change

	let output = Command::new(env!("CARGO_BIN_EXE_clippy-driver"))
	let output = Command::new(env!("CARGO_BIN_EXE_cargo-clippy"))

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[rustbot]

This PR was rebased onto a different master commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.