Skip Codecov upload step on forks #2652

Job	Run time
Run tests (3.10.4)	23s
Run tests (3.11.0)	23s
Run tests (3.11)	16s
Run tests (3.12)	17s
Run tests (3.9.12)	23s
Run tests (3.13.0)	23s
Run tests (pypy3.10)	21s
Run tests (3.13)	18s
Run tests (3.9)	21s
Run tests (3.12.0)	22s
Run tests (pypy3.11)	23s
Run tests (3.10)	16s
Run tests (pypy3.9)	22s
Run tests (3.14)	15s
Create an issue if daily tests failed	0s
	4m 43s

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