Replace pkg-config with pkgconf when the distribution is brew (#26891)
* Homebrew has deprecated pkg-config. `brew install pkg-config` now
installs pkgconf. Accordingly, this PR adjusts the expectations
of `conf-pkg-config` to depend on `pkgconf`.
* conf-pkg-config: let's leave the old ones untouched
Signed-off-by: Marcello Seri <marcello.seri@gmail.com>
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Signed-off-by: Marcello Seri <marcello.seri@gmail.com>
Co-authored-by: Emma Jin <emma@semgrep.com>
authored by