Changed styles cookies

[Chelakhovl]

Updated styles for Buttons and added z index

[Chelakhovl]

Removed Modal Logic:

Eliminated the modal functionality.
Retained only the initial cookie banner with "Allow" and "Decline" buttons.
Updated Styles:

Adjusted styles to center content properly and ensure responsive design.
Removed unnecessary modal-related styles.
Updated z-index:

Increased z-index for the cookie banner to 2000 to prevent overlapping issues with tooltips and other elements.
Updated Tests:

Removed tests related to the modal.
Updated unit tests to verify the correct behavior of the cookie banner:
Ensures buttons and links render correctly.
Verifies that cookies are saved on "Allow."
Confirms the banner disappears on "Decline."
Changes Made:
Component:

Removed modal-related code from CookieMod.jsx.
Updated logic to handle only the initial banner state.
Styles:

Cleaned up unused modal styles in CookieMod.module.css.
Adjusted banner layout and responsive behavior.
Tests:

Updated CookieMod tests to reflect simplified functionality.
Removed unnecessary modal-related test cases.