Fix smoke test, uses pathlib

[delucchi-cmu]

Change Description

Addresses smoke test failure.

There was an unfortunate merge combination with https://github.com/astronomy-commons/hipscat/pull/289 and https://github.com/astronomy-commons/hipscat/pull/288, where one uses os.path.join, and the other removes the import os statement. This updates to use pathlib for test path construction.

Code Quality

• [x] I have read the Contribution Guide
• [x] My code follows the code style of this project
• [x] My code builds (or compiles) cleanly without any errors or warnings
• [x] My code contains relevant comments and necessary documentation

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.69%. Comparing base (b829115) to head (578c46f). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #290 +/- ## ========================================== + Coverage 93.68% 93.69% +0.01% ========================================== Files 57 57 Lines 1979 1983 +4 ========================================== + Hits 1854 1858 +4 Misses 125 125 ```

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[github-actions[bot]]

Before [a7338cab]	After [5f9c710e]	Ratio	Benchmark (Parameter)
77.1±0.3ms	79.5±2ms	1.03	benchmarks.MetadataSuite.time_load_partition_info_order7
76.9±0.2ms	78.9±2ms	1.03	benchmarks.MetadataSuite.time_load_partition_join_info
123±0.8ms	126±0.4ms	1.02	benchmarks.time_test_alignment_even_sky
13.3±0.1ms	13.4±0.3ms	1.01	benchmarks.Suite.time_inner_pixel_alignment
362±2ms	365±1ms	1.01	benchmarks.Suite.time_outer_pixel_alignment
983±2μs	989±2μs	1.01	benchmarks.time_test_cone_filter_multiple_order
19.2±0.7ms	19.3±0.6ms	1	benchmarks.MetadataSuite.time_load_partition_info_order6
84.0±1ms	83.0±2ms	0.99	benchmarks.Suite.time_paths_creation
41.8±0.5ms	41.3±1ms	0.99	benchmarks.Suite.time_pixel_tree_creation

Click here to view all benchmarks.