Calling into worker via embind with PROXY_TO_PTHREAD=1 attempts to call GL functions on the main thread

Hi.
I am writing a rendering app. I need it to run in a secondary thread in order not to interfere with UI.
My linker config is as follow:

`-sINITIAL_MEMORY=134217728 -sMAX_WEBGL_VERSION=2 -sWASM=1 -sFULL_ES3 -sASYNCIFY -sPROXY_TO_PTHREAD=1 -sOFFSCREEN_FRAMEBUFFER=1 -sOFFSCREENCANVAS_SUPPORT=1 -sNO_EXIT_RUNTIME=1 -lembind -sENVIRONMENT=web,worker -sUSE_PTHREADS=1 -sPTHREAD_POOL_SIZE=8 -lpthread -msimd128 -matomics -mbulk-memory
`
Inside my app I am creating webgl2 context with the following attributes:

```
attrs.explicitSwapControl = EM_TRUE;
attrs.renderViaOffscreenBackBuffer = EM_FALSE;
attrs.enableExtensionsByDefault = EM_TRUE;
attrs.premultipliedAlpha = EM_TRUE;
attrs.preserveDrawingBuffer = EM_FALSE;
attrs.proxyContextToMainThread = EMSCRIPTEN_WEBGL_CONTEXT_PROXY_DISALLOW;
```
I am not sure about the second one but it is probably not related to my problem.
Now, I have a function called Init() and Run(). Init() creates webgl context and makes it current. Run() creates a rendering stuff and launches render loop with `emscripten_set_main_loop_arg(&Render, this, 0, 1);`

If Run() gets called within the app, like this:

```
int main(int argc, char* argv[])
{
if(!app.Init())
{
return EXIT_FAILURE;
}
app.Run();
return EXIT_SUCCESS;
}
```

It all works, Stuff is rendering.
But,I want this function to be called via button press on the front end. For this I am using embind to expose the function to JS.
If I call Run() via JS it looks like the webgl context gets lost. Also in the callstack I can see that the code tries to execute the function on the main thread. And my context lives in the worker thread.

```
WasmApp.js:4923 Uncaught TypeError: Cannot read properties of undefined (reading 'bindFramebuffer')
at _glBindFramebuffer (http://localhost:5500/WasmApp.js:4923:9)
at imports. (http://localhost:5500/WasmApp.js:3042:20)
at WasmApp.wasm._do_call (http://localhost:5500/WasmApp.wasm:wasm-function[1417]:0x6fd54)
at WasmApp.wasm.maybe_call_on_current_thread (http://localhost:5500/WasmApp.wasm:wasm-function[1416]:0x6f037)
at WasmApp.wasm.do_dispatch_to_thread (http://localhost:5500/WasmApp.wasm:wasm-function[1412]:0x6ebd2)
at WasmApp.wasm.emscripten_async_run_in_main_thread (http://localhost:5500/WasmApp.wasm:wasm-function[1418]:0x71cae)
at WasmApp.wasm.emscripten_async_run_in_main_runtime_thread_ (http://localhost:5500/WasmApp.wasm:wasm-function[1423]:0x725f7)
at WasmApp.wasm.glBindFramebuffer (http://localhost:5500/WasmApp.wasm:wasm-function[1260]:0x6172f)
at WasmApp.wasm.WebApp::Run() (http://localhost:5500/WasmApp.wasm:wasm-function[1238]:0x5f746)
at WasmApp.wasm.emscripten::internal::MethodInvoker