Improve setup for backend e2e tests

[lcian]

📜 Description

Stacked on: #4552

• Add an envrc so that the virtualenv is created automatically (if you have direnv and allow the dir) -- it is not strictly required to use direnv though
• Add requirements.txt and use it in the GH workflow and makefile
• Add test outputs to gitignore
• Use a dataclass for the test run configs and improve the output a bit

My editor added some whitespace changes due to autoformatting.

#skip-changelog

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	417.52 ms	455.00 ms	37.48 ms
Size	1.58 MiB	2.09 MiB	519.28 KiB

Baseline results on branch: feat/e2e-console-app-samples

Startup times

Revision	Plain	With Sentry	Diff
29f60d6	427.43 ms	465.10 ms	37.68 ms
ac946c9	500.50 ms	515.71 ms	15.21 ms
6e523f3	426.08 ms	444.80 ms	18.72 ms
97a4817	373.00 ms	418.60 ms	45.60 ms
2fe9357	447.49 ms	486.31 ms	38.82 ms

App size

Revision	Plain	With Sentry	Diff
29f60d6	1.58 MiB	2.09 MiB	519.27 KiB
ac946c9	1.58 MiB	2.09 MiB	519.04 KiB
6e523f3	1.58 MiB	2.09 MiB	519.28 KiB
97a4817	1.58 MiB	2.09 MiB	519.05 KiB
2fe9357	1.58 MiB	2.09 MiB	519.04 KiB

Previous results on branch: lcian/ref/improve-e2e

Startup times

Revision	Plain	With Sentry	Diff
a869d72	501.35 ms	560.96 ms	59.60 ms
21ce005	414.83 ms	465.98 ms	51.15 ms
56b50bc	431.61 ms	472.42 ms	40.80 ms

App size

Revision	Plain	With Sentry	Diff
a869d72	1.58 MiB	2.09 MiB	519.27 KiB
21ce005	1.58 MiB	2.09 MiB	519.27 KiB
56b50bc	1.58 MiB	2.09 MiB	519.28 KiB

[adinauer]

Nice, Thanks!