Search - Change default operator to OR instead of AND

[harshach]

Affected module
Does it impact the UI, backend or Ingestion Framework?

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Expected behavior
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Version:

• OS: [e.g. iOS]
• Python version:
• OpenMetadata version: [e.g. 0.8]
• OpenMetadata Ingestion package version: [e.g. openmetadata-ingestion[docker]==XYZ]

Additional context
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