fix(platform): icon-tab-bar _generateTabBarItems function improvement

[dpavlenishvili]

Related Issue(s)

closes #12474 #12554

Description

Screenshots

Before:

After:

Please check whether the PR fulfills the following requirements

During Implementation

1. Visual Testing:

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

2. API and functional correctness

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

3. Documentation and Example validations

• [ ] missing API documentation or it is not understandable
• [ ] poor examples
• [ ] 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
• [ ] 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
• [ ] Run npm run build-pack-library and test in external application
• [ ] update README.md
• [ ] Breaking Changes Wiki

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