[TLE][HCU] Support alloc, copy, local_ptr and pipeline

[alexshuang]

No description provided.

[sunnycase]

Thanks for the work here. Before this is finalized, could you please add a concise summary of the TLE primitive implementation plan?

It would be helpful to cover the main design points, such as the abstraction/lowering flow, compiler/runtime integration points, supported operator scope, dtype/shape/backend limitations, and the validation approach. Could you also include performance data for a few representative operators, ideally with baseline vs. TLE primitive numbers, test shapes, hardware/backend configuration, and measurement methodology?

For the expected level of detail and presentation style, PR #617 could be a useful reference: #617