Fixed few Accessibility requirements on new Home Summary Page issues

[harsha573252]

Frontend Pull Request Description

Fixed AxeDevTool accessibility requirements on home summary page issues.

Jiras:
https://swicloud.atlassian.net/browse/OO-50765
https://swicloud.atlassian.net/browse/OO-50699
https://swicloud.atlassian.net/browse/OO-50862
https://swicloud.atlassian.net/browse/OO-50565
https://swicloud.atlassian.net/browse/OO-50701
https://swicloud.atlassian.net/browse/OO-50786
https://swicloud.atlassian.net/browse/OO-59252
https://swicloud.atlassian.net/browse/OO-50766

Set-2:
https://swicloud.atlassian.net/browse/OO-50705
https://swicloud.atlassian.net/browse/OO-50767
https://swicloud.atlassian.net/browse/OO-50768
https://swicloud.atlassian.net/browse/NUI-6264

Before:

After fix:

Banner contrast:

Action button contrast

Set-2:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have updated change log
• I have been following Definition of done
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new lint warnings
• New and existing unit tests pass locally and on CI with my changes
• Any dependent changes have been merged and published in downstream modules

Screenshots (if applicable)

Additional Context (if necessary)