fix: select: address selector scoping bugs when portal and right icon and export type

[dkilgore-eightfold]

SUMMARY:

• Fixes bug where selected option styles were not being applied when dropdownProps={{ portal: true }} due to scoping
• Fixes bug where right icon when present overlaps Select chevron if Select is filterable and clearable

JIRA TASK (Eightfold Employees Only):

ENG-83195

CHANGE TYPE:

• Bugfix Pull Request
• Feature Pull Request

TEST COVERAGE:

• Tests for this change already exist
• I have added unittests for this change

TEST PLAN:

Pull the PR branch and run yarn and yarn storybook. Verify the Select stories behave as expected.

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.37%. Comparing base (4b121f4) to head (0670f8e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #802      +/-   ##
==========================================
- Coverage   84.38%   84.37%   -0.01%     
==========================================
  Files        1009     1009              
  Lines       19896    19896              
  Branches     7540     7540              
==========================================
- Hits        16789    16788       -1     
- Misses       3024     3025       +1     
  Partials       83       83              

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

[sbhatt-eightfold]

lgtm