Route error and warning status messages to stderr so -o json output stays parseable

[Mukuwul]

Description

dapr list -k -o json prints the namespace deprecation warning to stdout ahead of the JSON, so the output can't be parsed - the exact problem reported in #1015:

$ dapr list -k -o json | jq .
⚠  In future releases, this command will only query the "default" namespace by default. ...
[ ... ]      ← jq: parse error

Beyond that one warning, twelve FailureStatusEvent call sites across list, version, init, uninstall and the six workflow subcommands print errors to stdout, which both corrupts -o json/-o yaml output and hides errors from 2> redirection. Errors-to-stderr has been project policy since #748; these sites crept back in over time.

This PR routes all of them to stderr. The two remaining stdout sites in cmd/renew_certificate.go are intentionally left out - #1670 already moves them, and touching them here would just conflict.

No message text changes, so existing e2e assertions (which capture combined output) are unaffected; the invalid-output-format test asserts on the exit code, which is unchanged.

Issue reference

Fixes #1015

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests (existing e2e coverage exercises these paths via combined output and remains valid)
• Extended the documentation (n/a — behavior fix)