test(render): add comprehensive error handling tests

[Amirhf1]

Summary:

This PR adds comprehensive error handling tests for the render package, addressing the TODO comment requesting additional error test cases. The new tests ensure that all render types properly handle and report errors in edge cases.

Changes:
Added 6 new error handling test cases:

• TestRenderXMLError: Validates that XML renderer properly handles unsupported types (e.g., channels) and returns meaningful error messages
• TestRenderDataError: Tests error propagation when the underlying writer fails during Data rendering
• TestRenderBSONError: Ensures BSON renderer handles unsupported types gracefully
• TestRenderBSONWriteError: Verifies error handling when writing BSON data fails
• TestRenderHTMLTemplateError: Tests template execution errors with invalid field access
• TestRenderHTMLTemplateExecuteError: Validates error handling for nested field access errors in templates

Additionally, removed the TODO unit tests comment as the error cases are now properly covered.

Motivation:
Error handling tests are crucial for ensuring the framework behaves predictably when encountering invalid inputs or system failures. These tests improve confidence in the render package's robustness and help catch potential regressions.

Related Issues:
Addresses the TODO comment in render/render_test.go line 26-27.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.07%. Comparing base (3dc1cd6) to head (f7f1f07).
⚠️ Report is 249 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4541      +/-   ##
==========================================
- Coverage   99.21%   99.07%   -0.14%     
==========================================
  Files          42       46       +4     
  Lines        3182     3038     -144     
==========================================
- Hits         3157     3010     -147     
- Misses         17       19       +2     
- Partials        8        9       +1     

Flag	Coverage Δ
	?
--ldflags="-checklinkname=0" -tags sonic	99.07% <ø> (?)
-tags go_json	98.93% <ø> (?)
-tags nomsgpack	98.99% <ø> (?)
go-1.18	?
go-1.19	?
go-1.20	?
go-1.21	?
go-1.24	99.07% <ø> (?)
go-1.25	99.01% <ø> (?)
macos-latest	99.01% <ø> (-0.21%)	⬇️
ubuntu-latest	99.07% <ø> (-0.14%)	⬇️

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