[DOCS] Fixes security links

[lcawl]

Related to #46880

This PR fixes links to content that has moved from the Stack Overview to the Elasticsearch Reference.

In particular, it fixes the following broken links in elastic/stack-docs#700:

/tmp/docsbuild/target_repo/html/en/elasticsearch/plugins/master/cloud-aws-best-practices.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/xpack-ccr.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/delete-enrich-policy-api.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/enrich-setup.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/esms.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/execute-enrich-policy-api.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/get-enrich-policy-api.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html
11:08:36 INFO:build_docs: /tmp/docsbuild/target_repo/html/en/elasticsearch/reference/master/put-enrich-policy-api.html:
11:08:36 INFO:build_docs: - en/elastic-stack-overview/master/built-in-roles.html

[elasticmachine]

Pinging @elastic/es-docs (>docs)

[jrodewig]

LGTM. Thanks!