[llvm] updated buildkite pipeline generation (PR #65574)

[Mehdi Amini via llvm-commits]

joker-eph wrote:

This seems broken: https://buildkite.com/llvm-project/github-pull-requests/builds/1350#018a8848-f70e-47f4-8aec-0bb48c49a7ca

```
$ trap 'kill -- $' INT TERM QUIT; .ci/generate-buildkite-pipeline-premerge \| buildkite-agent pipeline upload
  | 2023-09-12 07:26:50 INFO   Reading pipeline config from STDIN
  | 2023-09-12 07:26:50 INFO   Updating BUILDKITE_COMMIT to "6de56a7dc4ff114eb36f42f1dbe8c63e557f061b"
  | Files modified:
  | mlir/include/mlir/Dialect/Affine/IR/AffineOps.h
  | mlir/include/mlir/Dialect/Affine/IR/AffineOps.td
  | mlir/include/mlir/IR/SymbolInterfaces.td
  | mlir/lib/Dialect/Affine/IR/AffineOps.cpp
  | mlir/test/Dialect/Affine/invalid.mlir
  | mlir/test/Dialect/Affine/load-store-invalid.mlir
  | Directories modified:
  | mlir
  | 2023-09-12 07:26:50 FATAL  Pipeline parsing of "(stdin)" failed: line 5: did not find expected alphabetic or numeric character
  | 🚨 Error: The command exited with status 1
```


This seems to match the ` - '*_result.json'`  replaced with ` - *_result.json`


https://github.com/llvm/llvm-project/pull/65574