When a new sidekiq job is created inside a sidekiq job

Hi All

When pushing a job to Sidekiq, configured the client middleware to pass metadata in 'key_value_hash' that is needed while processing the job

```
class SidekiqRequestStoreClientMiddleware
def call(worker_class, job, queue, redis_pool)
binding.pry
job['key_value_hash'] = RequestLocals.fetch(:key_value_hash) rescue nil
job['current_store_id'] = RequestLocals.current_store_id rescue nil
yield
end
end
```
```
class SidekiqRequestStoreServerMiddleware
def call(_worker, job, _queue)
##TODO Handle retries
create_instance(job)
yield
ensure
RequestLocals.clear!
RequestLocals.set_current_store_id(nil)
end

def create_instance(job)
RequestLocals.set_current_store_id(job['jid'])
key_value_hash = job['key_value_hash']

key_value_hash.each do |key, value|
RequestLocals.store[key.to_sym] = value
end

end
end
```

This seems to fail when a sidekiq job is created inside an another sidekiq job, because this time sidekiq server acts as a client. To handle this below code was added in config.

```
Sidekiq.configure_server do |config|
config.client_middleware do |chain|
chain.add SidekiqRequestStoreClientMiddleware
end
config.server_middleware do |chain|
chain.add SidekiqRequestStoreServerMiddleware
end
end
```
Still facing issue to access RequestLocals in nested sidekiq job

Start by reproducing a Sidekiq job that creates another job, then trace SidekiqRequestStoreClientMiddleware and SidekiqRequestStoreServerMiddleware through the nested-job path. Done means RequestLocals metadata remains available when the nested job is processed.

Written by the indexing model from the issue text.