Version 1.21 does not compile for the iOS platform

[fat-fellow]

# github.com/prometheus/client_golang/prometheus
In file included from process_collector_cgo_darwin.c:18:
/Applications/Xcode-16.2.0.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator18.2.sdk/usr/include/mach/mach_vm.h:1:2: error: mach_vm.h unsupported.
process_collector_cgo_darwin.c:66:17: error: call to undeclared function 'mach_vm_region'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

[dosubot]

Hey @fat-fellow! I'm here to help you with any bugs or questions you have while waiting for a human maintainer. Just let me know how I can assist you. Dosu

The compilation issue for version 1.21 on the iOS platform is due to the use of mach_vm.h and the function mach_vm_region, which are not available or supported on iOS. These elements are specific to macOS and are not part of the iOS SDK, leading to undeclared function errors when compiling for iOS ^[1].

To continue talking to Dosu, mention @dosu.

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[bwplotka]

Noted -- we need to exclude this during build, we might do it for 1.21.1 actually