ci: add global concurrency group for E2E tests #202

Job	Run time
Code checks / Actions lint check	29s
Tests / Integration tests (3.10, ubuntu-latest)	3m 10s
Tests / Integration tests (3.14, ubuntu-latest)	2m 46s
Code checks / Lint check / Lint check (3.13)	14s
Code checks / Lint check / Lint check (3.12)	10s
Code checks / Lint check / Lint check (3.10)	11s
Code checks / Type check / Type check (3.14)	11s
Doc checks / Doc checks / Docs check	1m 4s
Code checks / Type check / Type check (3.12)	12s
PR title check	4s
Code checks / Type check / Type check (3.10)	12s
Code checks / Type check / Type check (3.13)	12s
Code checks / Spell check	4s
Code checks / Lint check / Lint check (3.11)	14s
Code checks / Lint check / Lint check (3.14)	10s
Code checks / Type check / Type check (3.11)	15s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 20s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	1m 4s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 35s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	56s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	57s
Tests / E2E tests (3.10, ubuntu-latest)	6m 47s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 23s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	56s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	52s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 25s
Tests / E2E tests (3.14, ubuntu-latest)	7m 5s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	1m 29s
	35m 27s

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