Fix flaky linter clang-tidy relative path (pytorch#94093)

There are some occurrences when clang-tidy linter fails flakily with the following error, which is very weird:

```
>>> Lint for FILE:
  Error (CLANGTIDY) command-failed
    Failed due to FileNotFoundError:
    [Errno 2] No such file or directory: '.lintbin/clang-tidy'
```

For examples,

* https://hud.pytorch.org/pytorch/pytorch/commit/0a93e6db5abdcc9196199d68f0c8e56578a74315
* https://hud.pytorch.org/pytorch/pytorch/commit/203b2cad3e4c650955a47d9973cfec83a3960056

The binary is definitely there as the log shows that it has been downloaded successfully from S3.  Looking a bit closer, I notice that the linter uses `os.chdir` to jump around between the workspace and the build folder.  And it also refers to the binary with the relative path `.lintbin/clang-tidy` which doesn't exist in the latter.  AFAIK, the current working directory is per process (https://stackoverflow.com/questions/16388400/what-is-a-thread-specific-os-chdir-and-mkdir-in-python), so I suspect that there is a race here where one thread chdir into build while another thread tries to lint another file.  Thus the fix to use the absolute path to clang-tidy

Pull Request resolved: pytorch#94093
Approved by: https://github.com/malfet

Author: huydhn

tools/linter/adapters/clangtidy_linter.py

@@ -253,6 +253,14 @@ def main() -> None:
 
     abs_build_dir = Path(args.build_dir).resolve()
 
+    # Get the absolute path to clang-tidy and use this instead of the relative
+    # path such as .lintbin/clang-tidy. The problem here is that os.chdir is
+    # per process, and the linter uses it to move between the current directory
+    # and the build folder. And there is no .lintbin directory in the latter.
+    # When it happens in a race condition, the linter command will fails with
+    # the following no such file or directory error: '.lintbin/clang-tidy'
+    binary_path = os.path.abspath(args.binary)
+
     with concurrent.futures.ThreadPoolExecutor(
         max_workers=os.cpu_count(),
         thread_name_prefix="Thread",
@@ -261,7 +269,7 @@ def main() -> None:
             executor.submit(
                 check_file,
                 filename,
-                args.binary,
+                binary_path,
                 abs_build_dir,
             ): filename
             for filename in args.filenames