Root go-lib tests quarantined in CI (core, icms-translate); nvcf-go to fix

Problem

The root Bazel matrix row runs with tests_skip: true, so no root tests run in
CI (Go library, nvcf-cli, and the Java example). The blanket skip exists because
two src/libraries/go/lib areas are known to fail in the GitHub Actions
environment:

• //src/libraries/go/lib/pkg/core/... (core_test goroutine-leak detector)
• //src/libraries/go/lib/pkg/icms-translate/... (env-flaky)

Change

Root tests are now enabled, with just those two packages quarantined via
.github/bazel-root-test-quarantine.txt. Everything else in the root module
(nvcf-cli, the Java example, and all other go-lib packages) now runs on PRs and
main.

Ask (nvcf-go team)

Fix the two quarantined packages at the test layer (goroutine-leak cleanup and
the environment dependency), then delete their entries from the quarantine file
so full root coverage is restored. Do not change production code to make these
pass.

Start with .github/bazel-root-test-quarantine.txt and the root Bazel matrix configuration, then run the tests under src/libraries/go/lib/pkg/core/... and src/libraries/go/lib/pkg/icms-translate/... in the GitHub Actions environment. Inspect the existing test failures and make test-layer fixes for goroutine-leak cleanup and the environment dependency. Done means both packages pass, their quarantine entries are removed, and the remaining root tests stay enabled.