Refactor Sidekiq .perform_bulk usage to use .bulk_perform_async

What does this MR do and why?

This MR replaces perform_bulk with bulk_perform_async which is our wrapper over the push_bulk method. bulk_perform_async is shard-aware compared to perform_bulk.

Both bulk_perform_async and perform_bulk calls push_bulk

This is a follow-up to !145495 (comment 1804849962)

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Before	After

How to set up and validate locally

The 2 methods are interchangeable

1. Stop sidekiq using gdk stop rails-background-jobs.

2. On a gdk rails console, run both commands

Chaos::SleepWorker.bulk_perform_async([[1], [2]])
Chaos::SleepWorker.perform_bulk([[1], [2]])

3. Verify in the redis that 4 jobs are in the queue.

redis /Users/sylvesterchin/work/gitlab-development-kit/redis/redis.socket[1]> lrange queue:default 0 -1
1) "{\"retry\":3,\"queue\":\"default\",\"backtrace\":true,\"version\":0,\"store\":null,\"queue_namespace\":\"chaos\",\"class\":\"Chaos::SleepWorker\",\"args\":[2],\"jid\":\"962b7e9a593d4ed0944f25f5\",\"created_at\":1709862000.920937,\"meta.sidekiq_destination_shard_redis\":\"main\",\"correlation_id\":\"60625f9d925f673bc42df52cd0c666ed\",\"worker_data_consistency\":\"always\",\"idempotency_key\":\"resque:gitlab:duplicate:default:24808edb6838c48efcad29c8e4b7b5b1c8243aa7a545bb43a333e8284b18e49e\",\"duplicate-of\":\"ee33762f33033a2e8d690926\",\"size_limiter\":\"validated\",\"enqueued_at\":1709862000.933753}"
2) "{\"retry\":3,\"queue\":\"default\",\"backtrace\":true,\"version\":0,\"store\":null,\"queue_namespace\":\"chaos\",\"class\":\"Chaos::SleepWorker\",\"args\":[1],\"jid\":\"733ca1ec589ebf94d459b233\",\"created_at\":1709862000.920937,\"meta.sidekiq_destination_shard_redis\":\"main\",\"correlation_id\":\"60625f9d925f673bc42df52cd0c666ed\",\"worker_data_consistency\":\"always\",\"idempotency_key\":\"resque:gitlab:duplicate:default:2f0bc834677c58fe9b274ea1acbbcd384d61ad88243f7ae8b6c38429900bba4f\",\"duplicate-of\":\"b3e81a65e845c586de6de6d4\",\"size_limiter\":\"validated\",\"enqueued_at\":1709862000.933753}"
3) "{\"retry\":3,\"queue\":\"default\",\"backtrace\":true,\"version\":0,\"store\":null,\"queue_namespace\":\"chaos\",\"class\":\"Chaos::SleepWorker\",\"args\":[2],\"jid\":\"ee33762f33033a2e8d690926\",\"created_at\":1709861987.61459,\"correlation_id\":\"144544240ef63d68434cfedd0bb72fb3\",\"worker_data_consistency\":\"always\",\"idempotency_key\":\"resque:gitlab:duplicate:default:24808edb6838c48efcad29c8e4b7b5b1c8243aa7a545bb43a333e8284b18e49e\",\"size_limiter\":\"validated\",\"enqueued_at\":1709861987.6437812}"
4) "{\"retry\":3,\"queue\":\"default\",\"backtrace\":true,\"version\":0,\"store\":null,\"queue_namespace\":\"chaos\",\"class\":\"Chaos::SleepWorker\",\"args\":[1],\"jid\":\"b3e81a65e845c586de6de6d4\",\"created_at\":1709861987.61459,\"correlation_id\":\"c734976ec823003a8b36f90bd618592c\",\"worker_data_consistency\":\"always\",\"idempotency_key\":\"resque:gitlab:duplicate:default:2f0bc834677c58fe9b274ea1acbbcd384d61ad88243f7ae8b6c38429900bba4f\",\"size_limiter\":\"validated\",\"enqueued_at\":1709861987.6437812}"