[REFACTOR] Remove tvm.runtime.packed_func and container shims; route via tvm_ffi (#19442)
## Summary
- Delete the three Python shim modules that re-exported tvm-ffi types
under `tvm.runtime` / `tvm.ir`:
`python/tvm/runtime/packed_func.py`, `python/tvm/runtime/container.py`,
`python/tvm/ir/container.py`.
- Drop the matching re-exports from `tvm.runtime`, `tvm.ir`, and `tvm`
package init files, so
`tvm.runtime.PackedFunc`, `tvm.runtime.ShapeTuple`,
`tvm.runtime.String`, `tvm.ir.Array`,
`tvm.ir.Map`, and `tvm.container.Array` no longer exist.
- Migrate every productive caller, test, and tutorial to the canonical
names: `tvm_ffi.Function`,
`tvm_ffi.Shape`, `tvm_ffi.core.String`, `tvm_ffi.Array`, and
`tvm_ffi.Map`.
## Test plan
- [x] `pytest tests/python/all-platform-minimal-test` (75 passed, 77
skipped)
- [x] `pytest tests/python/runtime/test_runtime_container.py
tests/python/all-platform-minimal-test/test_runtime_packed_func.py` (20
passed)
- [x] `pytest tests/python/ir/test_node_reflection.py
tests/python/ir/test_container_structural_equal.py` (32 passed)
- [x] `pytest tests/python/relax/test_vm_build.py
tests/python/relax/test_vm_execbuilder.py
tests/python/relax/test_vm_codegen_only.py` (125 passed, 2 xfailed)
- [x] `pytest tests/python/relax/test_runtime_builtin.py
tests/python/relax/test_op_misc.py` (19 passed)
- [x] `pytest tests/python/target/test_target_target.py` (37 passed, 3
skipped)
- [x] `pre-commit run` clean on touched files
Tianqi Chen
9edd5bd958