add codecov upload action in coverage.yaml #642

Job	Run time
bad-pool-config-test	3m 16s
interop-jd-translator	2m 0s
interop-proxy-with-multi-ups	59s
interop-proxy-with-multi-ups-extended	55s
jds-do-not-fail-on-wrong-tsdatasucc	58s
jds-do-not-panic-if-jdc-close-connection	53s
jds-do-not-stackoverflow-when-no-token	1m 5s
jds-receive-solution-while-processing-declared-job	3m 40s
pool-sri-test-1-standard	3m 17s
pool-sri-test-close-channel	2m 40s
pool-sri-test-extended_0	3m 4s
pool-sri-test-extended_1	3m 14s
pool-sri-test-reject-auth	3m 46s
standard-coverage	3m 18s
sv1-test	3m 16s
translation-proxy	4m 5s
translation-proxy-broke-pool	2m 42s
translation-proxy-old-share	2m 38s
Aggregate MG Test Results	1s
	45m 47s

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