ci: add Valgrind testing workflow #341

Job	Run time
test-tarantool-integration / tarantool / build	5m 33s
test-tarantool-integration / memcached / run_tests	1m 19s
test-tarantool-integration / smtp / run_tests	12s
test-tarantool-integration / avro-schema / run_tests	7s
test-tarantool-integration / expirationd / run_tests	3m 11s
test-tarantool-integration / vshard / run_tests	3m 9s
test-tarantool-integration / metrics / run_tests	1m 5s
test-tarantool-integration / checks / run_tests	44s
test-tarantool-integration / mysql / run_tests	25s
test-tarantool-integration / php-client / run_tests	1m 2s
test-tarantool-integration / queue / run_tests	2m 47s
test-tarantool-integration / tarantool-c / run_tests	43s
test-tarantool-integration / tarantool-python / run_tests	3m 9s
test-tarantool-integration / crud / run_tests	3m 9s
test-tarantool-integration / ddl / run_tests	1m 3s
test-tarantool-integration / go-tarantool / run_tests	2m 9s
test-tarantool-integration / php-queue / run_tests	1m 12s
test-tarantool-integration / etcd-client / run_tests (v3.4.30)	3m 8s
test-tarantool-integration / etcd-client / run_tests (v3.5.12)	3m 6s
	37m 13s

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