update c api for custom allocator datareader modelbin and layer registration, add cookie userdata to layer

* cmake option for platform api uses
* adroid gpu ci does not rely on glslangvalidator, add android termux ci

* add vs2015 ci
* build x86 binary

Co-authored-by: Nyangfengmax <yangfengmax@didichuxing.com>

* add convolutiondepthwise/crop/sigmoid/tanh in operators.md

* sort by alphabet

* delete impl_type

* cannot delete impl_type

* cannot delete impl_type
Co-authored-by: Nyaobin.li <yaobin.li@rokid.com>

* add custom layer destroyer

* set default layer destroyer with 0

* enable ios arm64e

* fix build with old vulkan sdk

* link vulkan loader on macos, fix ios moltenvk library path

* there is no moltenvk arm64e library atm, link moltenvk directly for macos-arm64

* package openmp and glslang together
* find glslang targets in lib64
* define version string
* update moltenvk

Upgrade vulkansdk version:
vulkansdk-macos-1.2.135.0 -> vulkansdk-macos-1.2.162.0

Fixed compile warning [-Wunused-variable] in src/allocator.cpp for linux-gcc-nostdio-nostring build. (#2455)

Co-authored-by: Nyaobin.li <yaobin.li@rokid.com>