Revert "Temporarily disable api-docs-lint (#19735)" (#19800) (#19801)

This reverts commit e33d8bf.

(cherry picked from commit a16b558)

Co-authored-by: Andrew Wilkins <axw@elastic.co>

Author: mergify[bot]

Makefile

@@ -406,6 +406,5 @@ api-docs: ## Generate bundled OpenAPI documents
 
 .PHONY: api-docs-lint
 api-docs-lint: ## Run spectral API docs linter
-	@echo "api-docs-lint is temporarily disabled"
-	@exit 1
+	@npx @stoplight/spectral-cli lint "docs/spec/openapi/bundled.yaml" --ruleset "docs/spec/openapi/.spectral.yaml"