fix(platform): select - display proper value

[dmitry-stepanenko]

Related Issue(s)

closes #7616

Description

When selecting option in select, selected value should be displayed as text, instead we have [object Object]

Screenshots

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After:

Please check whether the PR fulfills the following requirements

During Implementation

1. Visual Testing:

• visual misalignments/updates
• [n/a] check Light/Dark/HCB/HCW themes
• [n/a] RTL/LTR - proper rendering and labeling
• [n/a] responsiveness(resize)
• [n/a] Content Density (Cozy/Compact/(Condensed))
• [n/a] States - hover/disabled/focused/active/on click/selected/selected hover/press state
• Interaction/Animation - open/close, expand/collapse, add/remove, check/uncheck
• [n/a] Mouse vs. Keyboard support
• [n/a] Text Truncation

2. API and functional correctness

• check for console logs (warnings, errors)
• [n/a] API boundary values
• [n/a] different combinations of components - free style
• [n/a] change the API values during testing

3. Documentation and Example validations

• [n/a] missing API documentation or it is not understandable
• poor examples
• [n/a] Stackblitz works for all examples

4. Accessibility testing
5. Browser Testing - Edge, Safari, Chrome, Firefox

PR Quality

• the commit message(s) follows the guideline:
  https://github.com/SAP/fundamental-ngx/blob/main/CONTRIBUTING.md
• [n/a] tests for the changes that have been done
• all items on the PR Review Checklist are addressed :
  https://github.com/SAP/fundamental-ngx/wiki/PR-Review-Checklist
• [n/a] Run npm run build-pack-library and test in external application
• [n/a] update README.md
• [n/a] Breaking Changes Wiki

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