Replace pkg_resources with importlib and add python 3.13 to test suite.
#1060
| Job | Run time |
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| 2m 39s | |
| 42s | |
| 3m 42s | |
| 1m 38s | |
| 1m 11s | |
| 1m 41s | |
| 4m 4s | |
| 1m 47s | |
| 0s | |
| 19m 2s |