[Fix] Correctly handling tags update in databricks_sql_endpoint

[alexott]

Changes

When updating tags of SQL Warehouse completely removing it, the reflect functionality incorrectly handled the case and tried to send an empty JSON object. This is fixed in current PR.

Resolves #5051

Tests

• make test run locally
• relevant change in docs/ folder
• covered with integration tests in internal/acceptance
• using Go SDK
• using TF Plugin Framework
• has entry in NEXT_CHANGELOG.md file

[Copilot]

Pull Request Overview

This PR fixes a bug in the databricks_sql_endpoint resource where updating tags and completely removing them incorrectly sent empty JSON objects to the API instead of omitting them entirely.

• Adds filtering logic to skip empty structs when processing collections in the reflect functionality
• Implements isStructEmpty helper function to detect structs with all zero values
• Comprehensive test coverage for the new empty struct filtering behavior

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
common/reflect_resource.go	Adds isStructEmpty function and modifies readListFromData to filter out empty structs
common/reflect_resource_test.go	Adds comprehensive tests for isStructEmpty and empty struct filtering in readListFromData
NEXT_CHANGELOG.md	Documents the bug fix for tags update handling

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[github-actions]

If integration tests don't run automatically, an authorized user can run them manually by following the instructions below:

Trigger:
go/deco-tests-run/terraform

Inputs:

• PR number: 5060
• Commit SHA: 499d3765fc261761cb5cbbff0cef27218c8334a9

Checks will be approved automatically on success.