Remove ecs.version from query.default_fields

[AlexRuiz7]

Description

Remove ecs.version from query.default_fields.

Issues Resolved

Closes #176

Check List

• [ ] New functionality includes testing.
  • [ ] All tests pass
• [ ] New functionality has been documented.
  • [ ] New functionality has javadoc added
• [ ] Commits are signed per the DCO using --signoff
• [ ] Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• [ ] GitHub issue/PR created in OpenSearch documentation repo for the required public documentation changes (#[Issue/PR number])

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