Review and action PR comments

[ankur22]

This is a catch all issue for all the comments that I want to address after all the getBy* APIs have been merged in.

• Add getByAltText in the browser module #4881 (comment)
• https://github.com/grafana/k6/pull/4904/files#r2223038986
• Add getByLabel in the browser module #4890 (comment)
• Add getByLabel in the browser module #4890 (comment)
• https://github.com/grafana/k6/pull/4890/files#r2223067227
• Add getByTitle in the browser module #4910 (comment)
• Add getByTitle in the browser module #4910 (comment)