chore: fix nwaku master tests

[weboko]

Description

We need to fix following E2E test setup:

public async ensureSubscriptionsAutosharding(
    contentTopics: string[]
  ): Promise<boolean> {
    this.checkProcess();

    return this.restCall<boolean>(
      "/relay/v1/auto/subscriptions",
      "POST",
      contentTopics,
      async (response) => response.status === 200
    );
  }