Add cmake compatibility to c-api (#4369)

* Add cmake compatibility to c-api

* Add CMake documentation to wasmtime.h

* Add CMake instructions in examples

* Modify CI for CMake support

* Use correct rust in CI

* Trigger build

* Refactor run-examples

* Reintroduce example_to_run in run-examples

* Replace run-examples crate with cmake

* Fix markdown formatting in examples readme

* Fix cmake test quotes

* Build rust wasm before cmake tests

* Pass CTEST_OUTPUT_ON_FAILURE

* Another cmake test

* Handle os differences in cmake test

* Fix bugs in memory and multimemory examples

examples/memory.c

@@ -16,6 +16,10 @@ You can compile and run this example on Linux with:
 Note that on Windows and macOS the command will be similar, but you'll need
 to tweak the `-lpthread` and such annotations.
 
+You can also build using cmake:
+
+mkdir build && cd build && cmake .. && cmake --build . --target wasmtime-memory
+
 Also note that this example was taken from
 https://github.com/WebAssembly/wasm-c-api/blob/master/example/memory.c
 originally
@@ -220,7 +224,7 @@ int main(int argc, const char* argv[]) {
 
   // Grow memory.
   printf("Growing memory...\n");
-  uint32_t old_size;
+  uint64_t old_size;
   error = wasmtime_memory_grow(context, &memory, 1, &old_size);
   if (error != NULL)
     exit_with_error("failed to grow memory", error, trap);