fix(select): resolve parity issues

[makafsal]

Closes #17931 #18164

Resolved a few parity issues

Changelog

Changed

• Resolved the issue [Bug]: Select component ignores "selected" property on page load #18164
• Changed AI gradient to match the React version
• Changed AI button focus to match the React version

Testing / Reviewing

Verify issue #18164
Please see the acceptance criteria table here

1. Open select playground storybook
2. Inspect the select element using the browser dev tools and select any option by putting the selected attribute
3. Also, we can utilize the value prop from controls to give the value prop to the component
   This way we can verify all cases mentioned in the table.

Verify AI Label gradient

1. Open the with AI label sub-story from the select storybook
2. Then compare the gradient style with the corresponding React storybook

Verify AI button focus style

1. Open the with AI label sub-story from the select storybook
2. Then press the tab button and compare the focus border thickness with the corresponding React storybook

Note Also verify this style from the AI Label component storybook

[netlify]

✅ Deploy Preview for v11-carbon-web-components ready!

Name	Link
🔨 Latest commit	8456f93
🔍 Latest deploy log	https://app.netlify.com/sites/v11-carbon-web-components/deploys/6789ee816f7c650008c067a6
😎 Deploy Preview	https://deploy-preview-18367--v11-carbon-web-components.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify]

✅ Deploy Preview for carbon-elements ready!

Name	Link
🔨 Latest commit	8456f93
🔍 Latest deploy log	https://app.netlify.com/sites/carbon-elements/deploys/6789ee81f6acee0008c6aedc
😎 Deploy Preview	https://deploy-preview-18367--carbon-elements.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify]

✅ Deploy Preview for v11-carbon-react ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	8456f93
🔍 Latest deploy log	https://app.netlify.com/sites/v11-carbon-react/deploys/6789ee81f90854000861ceaa
😎 Deploy Preview	https://deploy-preview-18367--v11-carbon-react.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.17%. Comparing base (0c2ff15) to head (8456f93).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18367   +/-   ##
=======================================
  Coverage   84.17%   84.17%           
=======================================
  Files         408      408           
  Lines       14435    14435           
  Branches     4660     4660           
=======================================
  Hits        12150    12150           
  Misses       2120     2120           
  Partials      165      165           

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