ci: Fix usage of codecov. #2314

Job	Run time
test-fuzz	2m 36s
scanbuild	6m 57s
build-test (ubuntu-20.04, gcc)	4m 26s
test-coverage	6m 23s
build-test (ubuntu-20.04, clang)	4m 21s
test-mbedtls (ubuntu-20.04)	2m 41s
build-test (fedora-32, gcc)	4m 40s
test-no-crypto-build	1m 15s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 35s
build-test (fedora-32, clang)	5m 0s
test-tcti-config	14m 35s
build-test (opensuse-leap, gcc)	4m 30s
coverity-test	0s
build-test (opensuse-leap, clang)	4m 35s
build-test (ubuntu-22.04, gcc)	4m 26s
build-test (ubuntu-22.04, clang)	4m 31s
build-test (alpine-3.15, gcc)	3m 55s
build-test (alpine-3.15, clang)	4m 44s
	1h 22m 10s

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