Discrepancy in nspkg.pth file when building from source vs. PyPI wheel

Hello,

I've encountered a discrepancy when building the `google_cloud_aiplatform` package from source compared to the wheel available on PyPI. I'm hoping you can provide some insight into this issue.

Upon comparing the locally generated wheel with the one from PyPI, I observed discrepancies within the google_cloud_aiplatform-1.25.0-py3.9-nspkg.pth file. Specifically, the content of this file differs between the two wheels.

Here's the content of the `nspkg.pth` file generated during my local build:

```python
import sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google',));importlib = __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdefault('google', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google', types.ModuleType('google'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
import sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google', 'cloud'));importlib = __import__('importlib.util');__import__('importlib.machinery');m = sys.modules.setdefault('google.cloud', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google.cloud', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google.cloud', types.ModuleType('google.cloud'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p);m and setattr(sys.modules['google'], 'cloud', m)
```

And here's the content of the `nspkg.pth` file from the PyPI wheel:

```python
import sys, types, os;has_mfs = sys.version_info > (3, 5);p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google',));importlib = has_mfs and __import__('importlib.util');has_mfs and __import__('importlib.machinery');m = has_mfs and sys.modules.setdefault('google', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google', types.ModuleType('google'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
import sys, types, os;has_mfs = sys.version_info > (3, 5);p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google',));importlib = has_mfs and __import__('importlib.util');has_mfs and __import__('importlib.machinery');m = has_mfs and sys.modules.setdefault('google', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google', types.ModuleType('google'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
import sys, types, os;has_mfs = sys.version_info > (3, 5);p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google', 'cloud'));importlib = has_mfs and __import__('importlib.util');has_mfs and __import__('importlib.machinery');m = has_mfs and sys.modules.setdefault('google.cloud', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google.cloud', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google.cloud', types.ModuleType('google.cloud'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p);m and setattr(sys.modules['google'], 'cloud', m)
```

For my local build, I followed these steps:

1. Used the Docker image specified in the repository.
2. Executed both `python3 -m build` and `python3 setup.py bdist_wheel`, and observed the same differences in the generated `nspkg.pth` files in both cases.

I would greatly appreciate it if you could help me understand:

1. What is the root cause of this difference in the `nspkg.pth` files?
2. How can I correct this discrepancy to ensure my local build matches the PyPI wheel?
3. Does this difference have any impact on the package's functionality?

Thank you for your time and assistance.