Ray Dashboard Serve page polish

[alanwguo]

Why are these changes needed?

In the log viewer, if the raw log line is not JSON, we do not show both "raw log line" and "formatted message" since both those values are the same.

In the serve page, the replica list dropdown includes the deployment name.

Related issue number

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• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

[brycehuang30]

LGTM!