fix(cli/test/bench/lsp): report errors as usual when only option is used

[Cre3per]

only show 'Test failed because the "only" option was used' when all tests pass

part of #28648
does not change deno's exit code

draft, help needed:

• lsp tests are flaky. res queue is empty occasionally
  • reproduce: repeatedly run cargo test lsp_testing
  • assumed cause: cli/lsp/testing/execution.rs, TestRunner::exec() runs a recv() loop which stops when there are no more events. The events are sent by run_tests_for_worker_inner(), which is spawned asynchronously. The recv() loop might start when no events have been written yet, and stops immediately.
  • how to help: confirm the assumption, then fix it or open a new issue. if assumption is wrong, find cause of flaky tests
• tests should use local std library, not jsr