Update Redis Enterprise openapi spec

[redis-enterprise-doc-sync]

Daily sync found updated API definitions.

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Note

Low Risk
Low risk: this PR only updates the published OpenAPI spec to document an additional LDAP-config deletion operation, with no runtime code changes.

Overview
Adds a new stable DELETE /v1/cluster/ldap operation to the OpenAPI spec, documenting how to clear the cluster LDAP configuration (requires config_ldap scope and defines 200/403/500 responses).

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}