Fix a11y issues in client/web/src/user

Created by: artemruts

Description

Fixes all issues in #17721 + issues raised by Axe and some TS warnings coming from client/web/src/user

Except:

• client/web/src/user/settings/accessTokens/UserSettingsCreateAccessTokenPage.tsx

  137:25 🔺 The autoFocus prop should not be used, as it can reduce usability and accessibility for users jsx-a11y/no-autofocus
• color contrast issues