feat: The default DuckDB connection is now based on a file, the location can be controlled with the DUCKPLYR_TEMP_DIR environment variable

[krlmlr]

Closes #439.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 77fa34a is merged into main:

• ✔️001_tpch_01: 24.2ms -> 23.3ms [-8.34%, +0.74%]
• ✔️001_tpch_02: 67.8ms -> 67.4ms [-1.82%, +0.57%]
• ✔️001_tpch_03: 38.8ms -> 39.4ms [-1.23%, +3.84%]
• ✔️001_tpch_04: 22.2ms -> 22.1ms [-2.94%, +2.07%]
• ✔️001_tpch_05: 56.9ms -> 56.8ms [-1.59%, +1.03%]
• 🚀001_tpch_06: 19.2ms -> 13.9ms [-29.62%, -25.66%]
• ✔️001_tpch_07: 74.8ms -> 74.8ms [-1.5%, +1.53%]
• ✔️001_tpch_08: 96.9ms -> 97.1ms [-0.7%, +1.03%]
• ✔️001_tpch_09: 71.6ms -> 71.7ms [-0.48%, +0.94%]
• ✔️001_tpch_10: 47.6ms -> 47.8ms [-0.7%, +1.16%]
• ✔️001_tpch_11: 32.4ms -> 32.2ms [-3.05%, +2.23%]
• ✔️001_tpch_12: 27.4ms -> 27.3ms [-1.77%, +1.48%]
• ✔️001_tpch_13: 25.9ms -> 26ms [-2.12%, +3.06%]
• ✔️001_tpch_14: 20.9ms -> 21ms [-1.65%, +2.63%]
• ✔️001_tpch_15: 31.6ms -> 31.7ms [-0.56%, +1.32%]
• ✔️001_tpch_16: 39.6ms -> 39.9ms [-1.23%, +2.58%]
• ✔️001_tpch_17: 26ms -> 26.7ms [-0.6%, +5.45%]
• ✔️001_tpch_18: 22.3ms -> 22.5ms [-1.62%, +3.14%]
• ✔️001_tpch_19: 68.2ms -> 68.4ms [-1.02%, +1.49%]
• ✔️001_tpch_20: 51.8ms -> 52.3ms [-0.27%, +2.06%]
• ✔️001_tpch_21: 80.4ms -> 80.2ms [-1.76%, +1.11%]
• ✔️001_tpch_22: 69.2ms -> 69.2ms [-1.12%, +1.13%]
• ✔️010_tpch_01: 82.7ms -> 82.1ms [-4.75%, +3.19%]
• ✔️010_tpch_02: 71.6ms -> 72ms [-5.09%, +6.31%]
• ✔️010_tpch_03: 59.5ms -> 61ms [-2.19%, +7.11%]
• ✔️010_tpch_04: 43.3ms -> 43.9ms [-2.6%, +5.31%]
• ✔️010_tpch_05: 92.4ms -> 90.5ms [-6.14%, +2.03%]
• ✔️010_tpch_06: 34.4ms -> 34.7ms [-10.67%, +12.47%]
• ✔️010_tpch_07: 107ms -> 106ms [-2.68%, +0.59%]
• ✔️010_tpch_08: 131ms -> 129ms [-4.31%, +1.13%]
• ✔️010_tpch_09: 118ms -> 118ms [-2.06%, +1.48%]
• ✔️010_tpch_10: 75.2ms -> 74.5ms [-2.58%, +0.88%]
• ✔️010_tpch_11: 38.1ms -> 37.5ms [-6.32%, +3.31%]
• ✔️010_tpch_12: 58.3ms -> 59.7ms [-6.4%, +11.14%]
• ✔️010_tpch_13: 52.1ms -> 52.4ms [-1.35%, +2.24%]
• ✔️010_tpch_14: 37.1ms -> 37.1ms [-1.3%, +1.33%]
• ✔️010_tpch_15: 53.6ms -> 55.1ms [-3.86%, +9.4%]
• ✔️010_tpch_16: 44.4ms -> 44.4ms [-2.5%, +2.26%]
• ✔️010_tpch_17: 55.1ms -> 55.4ms [-6.45%, +7.52%]
• ✔️010_tpch_18: 55.2ms -> 52.3ms [-13.75%, +3.21%]
• ✔️010_tpch_19: 115ms -> 116ms [-0.94%, +1.55%]
• ✔️010_tpch_20: 66.1ms -> 66ms [-3.94%, +3.81%]
• ✔️010_tpch_21: 237ms -> 239ms [-0.78%, +2.76%]
• ✔️010_tpch_22: 76.2ms -> 75.5ms [-3.65%, +1.92%]
• ✔️100_tpch_01: 325ms -> 320ms [-15.55%, +12.84%]
• ✔️100_tpch_02: 130ms -> 123ms [-19.42%, +8.94%]
• ✔️100_tpch_03: 180ms -> 179ms [-3.92%, +2.55%]
• ✔️100_tpch_04: 158ms -> 151ms [-11.46%, +2.32%]
• ✔️100_tpch_05: 282ms -> 272ms [-9.72%, +3.03%]
• ✔️100_tpch_06: 111ms -> 106ms [-17.43%, +8.86%]
• ❗🐌100_tpch_07: 222ms -> 241ms [+5.65%, +11.88%]
• ✔️100_tpch_08: 269ms -> 266ms [-6.31%, +4.09%]
• ✔️100_tpch_09: 337ms -> 347ms [-5.74%, +11.77%]
• ✔️100_tpch_10: 217ms -> 219ms [-5.47%, +7.22%]
• ✔️100_tpch_11: 90.7ms -> 88.7ms [-27.72%, +23.21%]
• ✔️100_tpch_12: 196ms -> 206ms [-6.94%, +17.47%]
• ✔️100_tpch_13: 342ms -> 334ms [-16.17%, +11.05%]
• ✔️100_tpch_14: 124ms -> 115ms [-16.52%, +1.28%]
• ✔️100_tpch_15: 218ms -> 213ms [-10.17%, +5.79%]
• ✔️100_tpch_16: 126ms -> 125ms [-7.99%, +5.05%]
• ✔️100_tpch_17: 178ms -> 186ms [-6.94%, +15.55%]
• ✔️100_tpch_18: 199ms -> 191ms [-12.03%, +3.48%]
• ❗🐌100_tpch_19: 281ms -> 307ms [+1.83%, +16.41%]
• ✔️100_tpch_20: 178ms -> 178ms [-10.03%, +10.35%]
• ✔️100_tpch_21: 1.31s -> 1.31s [-5.65%, +4.98%]
• ✔️100_tpch_22: 175ms -> 175ms [-8.21%, +7.94%]

Further explanation regarding interpretation and methodology can be found in the documentation.