Version bump of opensearch to 3.0.0.0-alpha1 and replacement of deprecated classes in ism

[aggarwalShivani]

Hi

Recently, some repositories like common-utils, job-scheduler, security plugin that are dependencies for ism, have moved to using opensearch-3.0.0-alpha1-SNAPSHOT.
With this opensearch version, major change is many classes are refactored and moved around. For ex. AcknowledgedResponse. AcknowledgedRequest etc.

Some PRs merged in opensearch ->

• Move o.o.action.support.master classes OpenSearch#17104
• Remove package org.opensearch.action.support.master OpenSearch#17118
• Remove more deprecated master classes OpenSearch#17166
• More removal of deprecated 'master' code OpenSearch#17218
• [JPMS Support] Refactoring of org.opensearch.client from :server module OpenSearch#17272

index-management plugin still uses opensearch-3.0.0-SNAPSHOT.
Issue: When latest versions of these dependencies is pulled into ism, it would result in incompatibility issues due to opensearch version mismatch.

Expectation: ism to do version bump to opensearch-3.0.0-alpha1-SNAPSHOT and replace all usages of deprecated classes to the latest ones.

Other dependencies:

• Alerting plugin - a draft PR already exists
• Notifications plugin - a PR is already raised for this too

Hopefully, once the dependent PRs get merged, ism will be unblocked, to make the version bump.
I can raise a PR for the same.