refactor!(core): update AttributeUpdate methods returns

[imrn99]

Description

Associated issue: closes #232

Content description:

• change:
  • AttributeUpdate::merge_incomplete return type to CMapResult<Self>
  • AttributeUpdate::merge_from_none return type to CMapResult<Self>
• add:
  • AttributeUpdate::split_from_none fallback method
• update all affected implementation

Additional information

• Breaking change

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 54.54545% with 15 lines in your changes missing coverage. Please review.

Project coverage is 79.26%. Comparing base (a924645) to head (e6f3563).

Files with missing lines	Patch %	Lines
honeycomb-core/src/attributes/collections.rs	38.88%	11 Missing ⚠️
honeycomb-core/src/attributes/traits.rs	71.42%	2 Missing ⚠️
honeycomb-kernels/src/grisubal/model.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #237      +/-   ##
==========================================
+ Coverage   79.21%   79.26%   +0.04%     
==========================================
  Files          52       52              
  Lines        6953     6950       -3     
==========================================
+ Hits         5508     5509       +1     
+ Misses       1445     1441       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[cedricchevalier19]

LGTM