Fix asv test disk space issue (#2673)

#### Reference Issues/PRs
<!--Example: Fixes #1234. See also #3456.-->
https://man312219.monday.com/boards/7852509418/pulses/18063353838
#### What does this implement or fix?
github runner image has secretly reduced the disk space available in a
recent upgrade
Fix the storage space issue by reducing the footprint of the build
#### Any other comments?

#### Checklist

<details>
  <summary>
   Checklist for code changes...
  </summary>
 
- [ ] Have you updated the relevant docstrings, documentation and
copyright notice?
- [ ] Is this contribution tested against [all ArcticDB's
features](../docs/mkdocs/docs/technical/contributing.md)?
- [ ] Do all exceptions introduced raise appropriate [error
messages](https://docs.arcticdb.io/error_messages/)?
 - [ ] Are API changes highlighted in the PR description?
- [ ] Is the PR labelled as enhancement or bug so it appears in
autogenerated release notes?
</details>

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Author: phoebusm

setup.py

@@ -6,6 +6,7 @@
 import shutil
 import re
 from tempfile import mkdtemp
+from pathlib import Path
 from setuptools import setup, Command, find_namespace_packages
 from setuptools import Extension, find_packages
 from setuptools.command.build_ext import build_ext
@@ -30,6 +31,45 @@ def _log_and_run(*cmd, **kwargs):
     print("Running " + " ".join(cmd))
     subprocess.check_call(cmd, **kwargs)
 
+def cleanup_vcpkg_artifacts():
+    cpp_dir = Path("cpp")
+    if not cpp_dir.exists():
+        return
+    
+    vcpkg_dir = cpp_dir / "vcpkg"
+    if not vcpkg_dir.exists():
+        return
+    
+    def safe_remove_directory(dir_path):
+        # To handle Windows symbolic links
+        if not dir_path.exists():
+            print(f"Directory not found (skipping): {dir_path}")
+            return
+        
+        try:
+            if os.path.islink(str(dir_path)):
+                target = os.readlink(str(dir_path))
+                if os.path.isabs(target):
+                    target_path = Path(target)
+                else:
+                    target_path = dir_path.parent / target
+                
+                os.unlink(str(dir_path))
+                print(f"Removed symbolic link: {dir_path}")
+                
+                if target_path.exists() and target_path.is_dir():
+                    shutil.rmtree(str(target_path))
+                    print(f"Removed target directory: {target_path}")
+            else:
+                shutil.rmtree(str(dir_path))
+                print(f"Removed: {dir_path}")
+        except Exception as e:
+            print(f"Warning: Could not remove {dir_path}: {e}")
+    
+    safe_remove_directory(vcpkg_dir / "buildtrees")
+    safe_remove_directory(vcpkg_dir / "downloads")
+    safe_remove_directory(vcpkg_dir / "packages")
+
 
 class CompileProto(Command):
     # When adding new protobuf versions, also update: setup.cfg, python/arcticdb/__init__.py
@@ -164,6 +204,8 @@ def build_extension(self, ext):
             cmd.append(f"-DVCPKG_INSTALLED_DIR={vcpkg_installed_dir}")
 
         _log_and_run(*cmd, cwd="cpp")
+        
+        cleanup_vcpkg_artifacts()
 
         search = f"cpp/out/{preset}-build"
         candidates = glob.glob(search)