feat: adding styles to checkbox disabled

[palbizu]

Description

• Updating styles of checkbox disabled
• Adjusting background color in the checkbox (same as radio buttons)

Testing

Old:

New:

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

Documentation

Make sure that you have documented corresponding changes in this repository or hypertrace docs repo if required.

[codecov]

Codecov Report

Merging #922 (9172117) into main (7343dec) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #922   +/-   ##
=======================================
  Coverage   85.34%   85.34%           
=======================================
  Files         803      803           
  Lines       16509    16509           
  Branches     2074     2074           
=======================================
  Hits        14090    14090           
  Misses       2387     2387           
  Partials       32       32           

Impacted Files	Coverage Δ
...ects/components/src/checkbox/checkbox.component.ts	100.00% <ø> (ø)

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[github-actions]

Unit Test Results

    4 files  ±0  257 suites  ±0   16m 50s ⏱️ +31s
926 tests ±0  926 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
932 runs  ±0  932 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 83db9d9. ± Comparison against base commit 7343dec.