Improve CI speed by removing duplicate run of tests (#1822)

Author: cijothomas

scripts/test.sh

@@ -2,13 +2,15 @@
 
 set -eu
 
-cargo test --workspace --all-features "$@" -- --test-threads=1
+echo "Running tests for all packages in workspace with --all-features"
+cargo test --workspace --all-features
 
 # See https://github.com/rust-lang/cargo/issues/5364
+echo "Running tests for opentelemetry package with --no-default-features"
 cargo test --manifest-path=opentelemetry/Cargo.toml --no-default-features
 
 # Run global tracer provider test in single thread
-cargo test --manifest-path=opentelemetry/Cargo.toml --all-features -- --ignored --test-threads=1
-
-cargo test --manifest-path=opentelemetry/Cargo.toml --all-features
-cargo test --manifest-path=opentelemetry-zipkin/Cargo.toml --all-features
+# //TODO: This tests were not running for a while. Need to find out how to run
+# run them. Using --ignored will run other tests as well, so that cannot be used.
+# echo "Running global tracer provider for opentelemetry-sdk package with single thread."
+# cargo test --manifest-path=opentelemetry-sdk/Cargo.toml --all-features -- --test-threads=1