ci: Fix usage of codecov. #821

Job	Run time
coverity-test	0s
test-coverage	4m 38s
build-test (ubuntu-20.04, gcc)	4m 29s
scanbuild	6m 37s
test-fuzz	2m 32s
build-test (ubuntu-20.04, clang)	4m 28s
build-test (fedora-32, gcc)	4m 37s
test-mbedtls (ubuntu-20.04)	2m 48s
build-test (fedora-32, clang)	4m 57s
test-mbedtls (ubuntu-22.04-mbedtls-3.1)	2m 51s
test-tcti-config	14m 12s
test-no-crypto-build	1m 16s
build-test (opensuse-leap, gcc)	4m 23s
build-test (opensuse-leap, clang)	4m 31s
build-test (ubuntu-22.04, gcc)	4m 30s
build-test (ubuntu-22.04, clang)	4m 36s
build-test (alpine-3.15, gcc)	3m 53s
build-test (alpine-3.15, clang)	4m 43s
	1h 20m 1s

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