Switch from curl-config to pkg-config for curl extension

Switch from curl-config to pkg-config for curl extension

First attemp to fix multiarch support (#74125) for curl
introduce some debian specificity (dpkg command)
so is not suitable for other environmant.

This is mostly related to a broken "curl-config" config on debian
which doesn't provide the correct build options, while pkg-config
works as expected.

This new attemp rely on pkg-config output instead.

Notice: this make pkg-config a hard dependency.
Is there system without pkg-config ?