Environments table is not wide enough to fit all the information

Problem

The current layout of the environments table no longer works for most screen widths: different columns clash with each other, making text hard to read.

It's also at its limit in terms of features and content: adding deployment tier information on the table as a new column is currently not possible.

See on link: https://gitlab.com/gitlab-com/www-gitlab-com/-/environments

Proposal

Make the table full screen, to improve readability and give room for more content. It's not a definitive solution, as this feature-set is likely to grow more complex, but it will improve the current experience:

(Note: Screenshot above contains improvements from #332443 (closed) and #332445 (closed) as well)