ci: collect and upload test coverage to coddecov vec-337 #246

Job	Run time
test-is-loadbalancer (3.12)	4m 59s
test-mtls (3.12)	5m 59s
test-mtls-auth (3.12)	5m 48s
test-exhaustive-vector-search (3.12)	32m 27s
test-mtls-auth-rbac (3.12)	1m 35s
test-normal (3.9)	5m 36s
test-tls (3.12)	5m 26s
test-tls-auth (3.12)	5m 45s
test-normal (3.10)	5m 36s
test-normal (3.11)	5m 45s
test-tls-auth-rbac (3.12)	1m 41s
test-normal (3.12)	5m 40s
upload-to-codecov	9s
	1h 26m 26s

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