Merge branch 'update-cells-blueprint' into 'master'

Extend Cells blueprint with Work streams, Availability and Iterations

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/118964



Merged-by: Lorena Ciutacu <lciutacu@gitlab.com>
Approved-by: Thong Kuah <tkuah@gitlab.com>
Approved-by: Dylan Griffith <dyl.griffith@gmail.com>
Approved-by: Lorena Ciutacu <lciutacu@gitlab.com>
Approved-by: Nick Nguyen <nnguyen@gitlab.com>
Approved-by: Omar Qunsul <oqunsul@gitlab.com>
Approved-by: Arturo Herrero <arturo.herrero@gmail.com>
Approved-by: Rutger Wessels <rwessels@gitlab.com>
Reviewed-by: Kamil Trzciński <ayufan@ayufan.eu>
Reviewed-by: Arturo Herrero <arturo.herrero@gmail.com>
Reviewed-by: Omar Qunsul <oqunsul@gitlab.com>
Reviewed-by: Lorena Ciutacu <lciutacu@gitlab.com>
Co-authored-by: Christina Lohr <clohr@gitlab.com>
Co-authored-by: Kamil Trzciński <ayufan@ayufan.eu>
Co-authored-by: Arturo Herrero <arturo.herrero@gmail.com>