replace pkg_resources with importlib.resources.files

[akremin]

Small fix to update desisurveyops code to modern standards that don't use pkg_resources. This was causing the code to crash with the new 2026 desiconda installation. This is a trivial change, so I'm self-merging.

[Copilot]

Pull request overview

This PR updates desisurveyops to avoid pkg_resources (which can be absent in newer environments) by switching resource/path resolution to stdlib mechanisms, preventing runtime crashes in the 2026 desiconda install.

Changes:

• Removed pkg_resources.resource_filename usage and imports.
• Resolved the repository data/ directory via a path relative to status_utils.py (__file__).
• Loaded the desiutil footprint file via importlib.resources.files, and reused get_history_tiles_dir() for locating the CSS template file.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
py/desisurveyops/status_utils.py	Removes pkg_resources and updates data/ and desiutil resource path resolution.
py/desisurveyops/status_html.py	Drops pkg_resources import and uses get_history_tiles_dir() to locate the CSS template in data/.

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