mgmt, support `advanced-versioning` on `@added` optional parameter in TypeSpec

[weidongxu-microsoft]

Source is from oracledb
https://github.com/Azure/azure-rest-api-specs/blob/main/specification/oracle/Oracle.Database.Management/models/exadata/giVersions.tsp#L41-L44

They added optional parameter to op. This is not break in REST API.

But it would cause break in SDK, as

#### `models.GiVersions` was modified

* `listByLocation(java.lang.String,models.SystemShapes,java.lang.String,com.azure.core.util.Context)` was removed

#### `models.GiVersions` was modified

* `listByLocation(java.lang.String,models.SystemShapes,java.lang.String,java.lang.String,com.azure.core.util.Context)` was added