[UX] Make T.prim_func typecheck as staticmethod (#13980)

This PR makes T.prim_func typecheck as static method to reduce
the set of warnings in tvmscript.

python/tvm/script/parser/tir/__init__.py

@@ -16,10 +16,20 @@
 # under the License.
 """The tir parser"""
 
+from typing import TYPE_CHECKING
+
 from ...ir_builder.tir import *  # pylint: disable=redefined-builtin
 from ...ir_builder.tir import ir as _tir
 from . import operation as _operation
 from . import parser as _parser
-from .entry import Buffer, Ptr, prim_func
+from .entry import Buffer, Ptr
+
+if TYPE_CHECKING:
+    # pylint: disable=invalid-name
+    # Define prim_func and make it type check as static method
+    # so most tvmscript won't trigger pylint error here.
+    prim_func = staticmethod
+else:
+    from .entry import prim_func
 
 __all__ = _tir.__all__ + ["Buffer", "Ptr", "prim_func"]