[Backport 2.x] Minor bug fixes for trace analytics v2 (#1894)

[ps48]

Description

• Update the theming in dark mode for scale of the service map
• Add data test-subj for cypress
• Update truncate usage to use imported lodash
• Add mode dependency to attributefilter useEffect
• update test snapshots

Issues Resolved

https://github.com/opensearch-project/dashboards-observability/issues/1820

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass, including unit test, integration test and doctest
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
  • [ ] New functionality has user manual doc added
• [x] Commits are signed per the DCO using --signoff

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