Update packages and version to Python 3.12

[petechd]

What is the context of this PR?

This updates project's Python to version 3.12 and updates some of the dev libraries since the poetry lock required regeneration as well. As a result some new flake8 config and some test changes had to be made.

How to review

Run benchmark and test all the places where Python got updated.

Checklist

• New static content marked up for translation
• Newly defined schema content included in eq-translations repo

[ons-eq-team]

Benchmark Results

Percentile Averages:
50th: 84ms
90th: 153ms
95th: 259ms
99th: 842ms
99.9th: 1667ms
GETs (99th): 1249ms
POSTs (99th): 371ms

PDF: 2800ms
Session: 47000ms

Total Requests: 66,244
Total Failures: 0
Error Percentage: 0.0%

[berroar]

Needs a PR description though I accept the change is fairly obvious 😆

[berroar]

Benchmark ResultsPercentile Averages:50th: 84ms90th: 153ms95th: 259ms99th: 842ms99.9th: 1667msGETs (99th): 1249msPOSTs (99th): 371msPDF: 2800msSession: 47000msTotal Requests: 66,244Total Failures: 0Error Percentage: 0.0%

The stats here are not great, and although they have been up and down recently in benchmark i think it is worth running some more tests to assess whether there are some performance implications here.

[ons-eq-team]

Benchmark Results

Percentile Averages:
50th: 83ms
90th: 146ms
95th: 236ms
99th: 931ms
99.9th: 1805ms
GETs (99th): 1450ms
POSTs (99th): 332ms

PDF: 3100ms
Session: 60000ms

Total Requests: 65,980
Total Failures: 1
Error Percentage: 0.0%

[Yuyuutsu]

Do we need to do a Performance investigation in benchmark?

[ons-eq-team]

Benchmark Results

Percentile Averages:
50th: 85ms
90th: 217ms
95th: 784ms
99th: 1300ms
99.9th: 2601ms
GETs (99th): 1765ms
POSTs (99th): 762ms

PDF: 4000ms
Session: 52000ms

Total Requests: 63,620
Total Failures: 2
Error Percentage: 0.0%

[Yuyuutsu]

Changes look good, and benchmark results seem similar to the results you have run.