Fix posix path conversion on Windows in DatasetStatsHook

[ravi-kumar-pilla]

Description

Resolves #1797

Development notes

• Passing PurePath to the get_filepath_str function instead of str filepath which complains on Windows
• Addressed warnings of deprecation in demo-project

file_path = get_filepath_str(Path(dataset._filepath), dataset._protocol)

QA notes

• All tests should pass
• When running on a windows machine, there should not be any warning message as shown here -

WARNING  Unable to get file size for the dataset SQLQueryDataset(execution_options={}, filepath=C:/path/to/data/00_scripts/dim_postal_code.sql, load_args={}, sql=None): 'str' object has no attribute 'as_posix'

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added new entries to the RELEASE.md file
• Added tests to cover my changes

[astrojuanlu]

Declining review requests of small engineering PRs for my own sanity 🙏🏽 If you need extra reviews kindly ask the framework team.

[ravi-kumar-pilla]

Declining review requests of small engineering PRs for my own sanity 🙏🏽 If you need extra reviews kindly ask the framework team.

Sure, I added as you were present in the initial discussion. But, I will make sure you are not included on small engineering PRs. Thank you 👍

[SajidAlamQB]

Looks good to me, thanks for fixing this!

[rashidakanchwala]

LGTM. Thanks :)