Migrate shader hooks and plugins to luma.gl alpha.9 - #11022

#### Shader injections

This applies if a custom layer, extension or shader module uses `inject`. Move the injections into a `ShaderPlugin` in `plugins`. An `inject` field on a `ShaderModule` is now ignored without a warning.

```ts
// Before
const myModule = {name: 'myFilter', fs, inject: {'fs:DECKGL_FILTER_COLOR': 'color.a *= 0.5;'}};
const shaders = super.getShaders();
return {...shaders, modules: [...shaders.modules, myModule]};

// After
const myModule = {name: 'myFilter', fs};
const shaders = super.getShaders();
return {
  ...shaders,
  plugins: [...(shaders.plugins || []), {
    name: 'myFilter',
    module: myModule,
    injections: {'glsl:fs:DECKGL_FILTER_COLOR': 'color.a *= 0.5;'}
  }]
};
```

#### `addShaderHook`

This applies if you register your own injection targets. Call `addShaderInjectionTarget` with a descriptor.

```ts
// Before
ShaderAssembler.getDefaultShaderAssembler().addShaderHook('fs:MY_FILTER(inout vec4 color)');

// After
getShaderAssembler('glsl').addShaderInjectionTarget({
  name: 'MY_FILTER',
  stage: 'fragment',
  glsl: {parameters: 'inout vec4 color'}
});
```

#### Picking and shadows in custom models

This applies if you create a `Model` without `this.getShaders()` and add the `picking` or `shadow` module. Pass `pickingPlugin` or `shadowPlugin` from `@deck.gl/core` in `plugins` instead.

```ts
// Before
new Model(device, {vs, fs, modules: [picking]});

// After
new Model(device, {vs, fs, plugins: [pickingPlugin]});
```