Related to #51419
- migrate required error and utility helpers into the client module
- preserve RPC error codes, retry metadata, and errors.Is semantics
- expose client-local RPC errors and common error sentinels
- remove github.com/milvus-io/milvus/pkg/v3 and server-only dependencies
- lower the client Go version to 1.24.9
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Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>
