Revert default wait strategy hook

[cristianrgreco]

Summary

• Reverts Add default wait strategy hook #1340 and removes the default wait strategy hook that is no longer needed for the MockServer update.
• Restores the wait strategy selector fallback to Wait.forListeningPorts().
• Removes the associated docs and selector unit test for the reverted hook.

Verification

• npm run format
• npm run lint
• npm run check-compiles
• npm test -- packages/testcontainers/src/wait-strategies/utils/wait-strategy-selector.test.ts

Test results

All verification commands passed locally.

Semver impact

Patch. This restores the behavior from before #1340. The latest published release marked by GitHub is v12.0.0, published on 2026-05-19, before #1340 merged on 2026-05-27, so this does not remove an API from the latest published release.

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