[Feature] Disallow update operation for HugeGraphComputerJob

[Radeity]

Feature Description (功能描述)

ref #252 (comment)

[coderzc]

Note: If crdName and jobId are identical, then jobId can not be repeated

[Radeity]

Note: If crdName and jobId are identical, then jobId can not be repeated

Get, but can we directly use {namespace}-{name} from metadata of HugeGraphComputerJob as jobId, and users don't have to define jobId additionally.