[bazel][mlir][python] Port llvm#155741: stub auto-generation (llvm#157173)

* Nanobind >= 2.9 is required now. Use 2.9.2
* Remove pyi filegroups that now refer to deleted files

Author: rupprecht

utils/bazel/WORKSPACE

@@ -186,9 +186,9 @@ maybe(
     http_archive,
     name = "nanobind",
     build_file = "@llvm-raw//utils/bazel/third_party_build:nanobind.BUILD",
-    sha256 = "bb35deaed7efac5029ed1e33880a415638352f757d49207a8e6013fefb6c49a7",
-    strip_prefix = "nanobind-2.4.0",
-    url = "https://github.com/wjakob/nanobind/archive/refs/tags/v2.4.0.tar.gz",
+    sha256 = "8ce3667dce3e64fc06bfb9b778b6f48731482362fb89a43da156632266cd5a90",
+    strip_prefix = "nanobind-2.9.2",
+    url = "https://github.com/wjakob/nanobind/archive/refs/tags/v2.9.2.tar.gz",
 )
 
 load("@rules_python//python:repositories.bzl", "py_repositories", "python_register_toolchains")

utils/bazel/llvm-project-overlay/mlir/python/BUILD.bazel

@@ -32,13 +32,6 @@ filegroup(
     ],
 )
 
-filegroup(
-    name = "ExecutionEnginePyIFiles",
-    srcs = [
-        "mlir/_mlir_libs/_mlirExecutionEngine.pyi",
-    ],
-)
-
 filegroup(
     name = "IRPyFiles",
     srcs = [
@@ -53,14 +46,6 @@ filegroup(
     ]),
 )
 
-filegroup(
-    name = "IRPyIFiles",
-    srcs = [
-        "mlir/_mlir_libs/_mlir/__init__.pyi",
-        "mlir/_mlir_libs/_mlir/ir.pyi",
-    ],
-)
-
 filegroup(
     name = "MlirLibsPyFiles",
     srcs = [
@@ -75,13 +60,6 @@ filegroup(
     ],
 )
 
-filegroup(
-    name = "PassManagerPyIFiles",
-    srcs = [
-        "mlir/_mlir_libs/_mlir/passmanager.pyi",
-    ],
-)
-
 filegroup(
     name = "RewritePyFiles",
     srcs = [
@@ -659,13 +637,6 @@ gentbl_filegroup(
     ],
 )
 
-filegroup(
-    name = "PDLPyIFiles",
-    srcs = [
-        "mlir/_mlir_libs/_mlir/dialects/pdl.pyi",
-    ],
-)
-
 filegroup(
     name = "PDLPyFiles",
     srcs = [
@@ -756,13 +727,6 @@ filegroup(
 # Quant dialect.
 ##---------------------------------------------------------------------------##
 
-filegroup(
-    name = "QuantPyIFiles",
-    srcs = [
-        "mlir/_mlir_libs/_mlir/dialects/quant.pyi",
-    ],
-)
-
 filegroup(
     name = "QuantPyFiles",
     srcs = [