fix: missing stressors checking (#1387)

[ti-srebot]

cherry-pick #1387 to release-1.1
You can switch your code base to this Pull Request by using git-extras:

# In chaos-mesh repo:
git pr https://github.com/chaos-mesh/chaos-mesh/pull/1391

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/chaos-mesh.git pr/1391:release-1.1-f6e06375f651

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Signed-off-by: Yue Yang g1enyy0ung@gmail.com

What problem does this PR solve?

Resolve #1380.

This PR prevents unexpected behaviors when creating StressChaos.

What is changed and how does it work?

After changes, the CPU or Memory workers must be at least one bigger than zero.

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-1.1@4033c8e). Click here to learn what that means.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             release-1.1    #1391   +/-   ##
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  Coverage               ?   51.69%           
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  Files                  ?       78           
  Lines                  ?     4966           
  Branches               ?        0           
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  Hits                   ?     2567           
  Misses                 ?     2137           
  Partials               ?      262           

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[WangXiangUSTC]

LGTM