ci: add global concurrency group for E2E tests #203

Job	Run time
PR title check	6s
Code checks / Spell check	4s
Tests / Integration tests (3.14, ubuntu-latest)	3m 7s
Tests / Integration tests (3.10, ubuntu-latest)	1m 23s
Code checks / Actions lint check	34s
Doc checks / Doc checks / Docs check	1m 8s
Code checks / Type check / Type check (3.14)	12s
Code checks / Type check / Type check (3.12)	16s
Code checks / Type check / Type check (3.10)	14s
Code checks / Type check / Type check (3.13)	13s
Tests / E2E tests (3.10, ubuntu-latest)	4m 5s
Code checks / Lint check / Lint check (3.13)	15s
Code checks / Lint check / Lint check (3.10)	13s
Code checks / Type check / Type check (3.11)	15s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	57s
Code checks / Lint check / Lint check (3.11)	9s
Code checks / Lint check / Lint check (3.12)	15s
Code checks / Lint check / Lint check (3.14)	13s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	57s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 45s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 25s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	59s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	51s
Tests / E2E tests (3.14, ubuntu-latest)	3m 29s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 30s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 21s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	57s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	1m 16s
	28m 9s

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