Added SoS metadata for Route53 code example in Rust (#2637)
Added SoS metadata for Route53 code example in Rust (#2637)

* Added SoS metadata for Route53 code example in Rust

* Changed service tag for Route53 SoS metadata

* Changed AWS to entity in Route53 SoS metadata

* Added snippet tags to Route53 code example in Rust

* Updated SoS metadata for Route53 code examples in Rust based on feedback
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