Merge branch 'ps-extensions-marketplace-web-ide' into 'master'

Add Extensions Marketplace in Web IDE

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151352



Merged-by: Enrique Alcántara <ealcantara@gitlab.com>
Approved-by: rossfuhrman <rfuhrman@gitlab.com>
Approved-by: Taylor Vanderhelm <tvanderhelm@gitlab.com>
Approved-by: Ashraf Khamis <akhamis@gitlab.com>
Approved-by: Enrique Alcántara <ealcantara@gitlab.com>
Reviewed-by: rossfuhrman <rfuhrman@gitlab.com>
Reviewed-by: Ash McKenzie <amckenzie@gitlab.com>
Reviewed-by: Enrique Alcántara <ealcantara@gitlab.com>
Reviewed-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Co-authored-by: Paul Slaughter <pslaughter@gitlab.com>