fix(entities): remove relationships field from entity and entities query

[vagrawal-newrelic]

Description

Please include a summary of the change and which issue is fixed (if relevant).
Relationships field in entity and entities query is deprecated. So excluded the field from the query to fix the below warning.

if relationship between entities is required relatedEntities query need to be used in future.

Jira ticket

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

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• My commit message follows conventional commits
• My code is formatted to Go standards
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works