[semconv] mark deprecated enum value exports as @deprecated

[trentm]

Currently @opentelemetry/semantic-conventions/incubating does not apply the @deprecated ... jsdoc tag to enum values that are deprecated. For example:

• The "coldfusion" value for db.system is deprecated: https://github.com/open-telemetry/semantic-conventions/blob/v1.28.0/model/database/registry.yaml#L162-L164
• But our export does not say so: https://github.com/open-telemetry/opentelemetry-js/blob/v1.28.0/semantic-conventions/src/experimental_attributes.ts#L1884-L1887