chore(instrumentation-restify)!: remove package restify

[fiyinfoluwa001]

Title
Restify is no longer maintained (last release 2023) and restify@11 does not work with Node.js 24+.

Which problem is this PR solving?

restify is no longer maintained (last release was in 2023), and restify@11 (the latest major) does not work with Node.js 24+. Continuing to ship and maintain this instrumentation is not sustainable.

This is part of the SDK 3.0 cleanup tracked in open-telemetry/opentelemetry-js#6875.

Short description of the changes

• Deletes the packages/instrumentation-restify package entirely
• Removes it from auto-instrumentations-node (dependency, import, map entry, README)
• Removes it from release-please-config.json and .release-please-manifest.json
• Removes it from .github/component-label-map.yml and .github/component_owners.yml

Closes : open-telemetry/opentelemetry-js#6875

@trentm

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[github-actions]

This package does not have an assigned component owner and is considered unmaintained. As such this package is in feature-freeze and this PR will be closed with 14 days unless a new owner or a sponsor (a member of @open-telemetry/javascript-approvers) for the feature is found. It is the responsibility of the author to find a sponsor for this feature.
Are you familiar with this package? Consider becoming a component owner.

[aryamohanan]

This change intended for SDK v3? If so, how are we planning to handle the merge? Are we going to create a separate v3 branch, or merge this into main and include it in the v3 release? Just curious to understand the plan.