[HeaderAction and SuiteHeader] Fix accessibility scan violations

[kalyanixraut]

What package is this for?

• React
• Angular

Describe the bug

When IBM a11y scan is executed on storybook, violations are reported.

To Reproduce

Steps to reproduce the behavior:

Run the accessibility scan in storybook and following are the violations

Environment/versions:

• OS: MacOS
• Browser:chrome
• carbon-addons-iot-react version: [e.g. v2.60.0]