fix: updating checkbox component in multi-select

[palbizu]

Description

The checkbox used within the multi-select component was replaced by the component belonging to the library and also some minor styles were modified.

Testing

• Visual test

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 #730 (6432432) into main (72e5b49) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #730   +/-   ##
=======================================
  Coverage   85.20%   85.20%           
=======================================
  Files         786      786           
  Lines       16095    16096    +1     
  Branches     2003     2003           
=======================================
+ Hits        13713    13714    +1     
  Misses       2349     2349           
  Partials       33       33           

Impacted Files	Coverage Δ
...ponents/src/multi-select/multi-select.component.ts	98.43% <ø> (ø)
...components/src/multi-select/multi-select.module.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 72e5b49...6432432. Read the comment docs.

[aaron-steinfeld]

lgtm; will let anand take a look and see if he has any other ideas

[github-actions]

Unit Test Results

    4 files  246 suites   15m 54s ⏱️
883 tests 883 ✔️ 0 💤 0 ❌
887 runs  887 ✔️ 0 💤 0 ❌

Results for commit 2f3f763.