ci: use codecov command line tool (#33132)

* ci: install codecov to nigthly image

* ci: use codecov command line tool

ci/docker-rust-nightly/Dockerfile

@@ -10,4 +10,8 @@ RUN set -x \
  && cargo --version \
  && cargo install grcov \
  && rustc +nightly-$date --version \
- && cargo +nightly-$date --version
+ && cargo +nightly-$date --version \
+ # codecov
+ && curl -Os https://uploader.codecov.io/latest/linux/codecov \
+ && chmod +x codecov \
+ && mv codecov /usr/bin

ci/test-coverage.sh

@@ -29,10 +29,7 @@ if [[ -z "$CODECOV_TOKEN" ]]; then
   echo "^^^ +++"
   echo CODECOV_TOKEN undefined, codecov.io upload skipped
 else
-  # We normalize CI to `1`; but codecov expects it to be `true` to detect Buildkite...
-  # Unfortunately, codecov.io fails sometimes:
-  #   curl: (7) Failed to connect to codecov.io port 443: Connection timed out
-  CI=true bash <(while ! curl -sS --retry 5 --retry-delay 2 --retry-connrefused --fail https://codecov.io/bash; do sleep 10; done) -Z -X gcov -f target/cov/lcov.info
+  codecov -t "${CODECOV_TOKEN}"
 
   annotate --style success --context codecov.io \
     "CodeCov report: https://codecov.io/github/solana-labs/solana/commit/${CI_COMMIT:0:9}"