fix error handling in chaos-dashboard to avoid panic (#1103)

[ti-srebot]

cherry-pick #1103 to release-1.0

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What problem does this PR solve?

Accessing certain API interfaces may cause chaos-dashboard panic

What is changed and how does it work?

Exit the function directly when an error is encountered

Checklist

Tests

• Unit test
• E2E test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Breaking backward compatibility

Related changes

• Need to update the documentation

Does this PR introduce a user-facing change?

NONE

[ti-srebot]

/run-all-tests

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (release-1.0@5f83f95). Click here to learn what that means.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             release-1.0    #1105   +/-   ##
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  Coverage               ?   48.27%           
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  Files                  ?       72           
  Lines                  ?     4360           
  Branches               ?        0           
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  Hits                   ?     2105           
  Misses                 ?     2046           
  Partials               ?      209           

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