fix: run link checks when relocation is disabled

[rootsec1]

binary_relocation: false currently returns from post-processing before dynamic binaries are discovered, so it also disables requested overlinking and overdepending checks. The same coupling prevents those checks from running on Windows, where relocation itself is intentionally skipped.

This change discovers every supported binary independently of the relocation selection. Relinking still happens only for paths selected by binary_relocation, and never on Windows; the complete discovered set is then passed to the existing linking checks. NoArch and WASM exclusions are unchanged.

Regression coverage exercises an undeclared zlib link with relocation disabled on Linux and Windows, plus a declared-dependency Linux build that records the pre-processing binary hash and verifies the packaged binary is byte-identical.

Verified locally with:

• pixi run test-end-to-end-ci (220 passed, 18 skipped)
• pixi run cargo test --workspace --all-targets --features=recipe-generation -- --nocapture
• pixi run -e pre-commit lint
• pixi run cargo fmt --all -- --check
• pixi run cargo clippy --workspace --all-targets --features=recipe-generation -- -D warnings

Closes #2771