feat: include cmaClientOptions in FunctionEventContext [EXT-6303]

[jjolton-contentful]

To use the CMA in a function, install contentful-management into your project and initialize it like so:

import * as contentful from "contentful-management";

export const handler: FunctionEventHandler<
  FunctionTypeEnum.AppEventHandler,
> = async (event: AppEventRequest, context: FunctionEventContext) => {
  const cma = contentful.createClient(
    context.cmaClientOptions!,
    {
      defaults: {
        spaceId: context.spaceId,
        environmentId: context.environmentId,
      },
      type: "plain",
    }
  );
   
  // ...
}

[contentful-automation]

🎉 This PR is included in version 3.13.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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