making CI faster by ~1 min; (#359)

* making CI faster by ~1 min; cargo test does not need to run --release

* change (ci): return --release
15 jobs for tarpaulin in 9 minutes and 33 seconds (queued for 13 seconds)
latest
Status Job ID Name Coverage
  Check
passed #488057
linux-docker
check-std

00:01:29

passed #488058
linux-docker
check-wasm

00:02:41

 
  Workspace
passed #488059
linux-docker
build-std

00:02:00

passed #488060
linux-docker
build-wasm

00:02:21

passed #488063
linux-docker
clippy-std

00:01:15

passed #488064
linux-docker
clippy-wasm

00:01:35

passed #488062
linux-docker
codecov

00:02:46

passed #488065
linux-docker
fmt

00:00:29

passed #488061
linux-docker
test

00:03:08

 
  Examples
passed #488068
linux-docker
examples-clippy-std

00:01:07

passed #488069
linux-docker
examples-clippy-wasm

00:01:20

passed #488070
linux-docker
examples-contract-build

00:01:15

passed #488067
linux-docker
examples-fmt

00:00:13

passed #488071
linux-docker
examples-generate-metadata

00:02:30

passed #488066
linux-docker
examples-test

00:01:34