Make repository analytics graphs responsive

What does this MR do and why?

For #362647 (closed)

This MR makes the graphs on the project-level and group-level repository analytics pages respond to changes in viewport width by passing the responsive attribute to them.

Screenshots or screen recordings

	before	after
project	Screen_Recording_2022-07-26_at_21.18.33	Screen_Recording_2022-07-26_at_21.02.38
group	Screen_Recording_2022-07-26_at_21.21.39	Screen_Recording_2022-07-26_at_21.03.52

How to set up and validate locally

Project-level:

1. git checkout master and navigate to a project
2. in the sidebar, choose Analytics => Repository
3. resize the browser, observe that the graphs are not responsive 🐛
4. git checkout 362647-resizeable-repo-analytics-graphs
5. refresh, resize the browser, now the graphs should be responsive ✨

Group-level:

1. have a GitLab Premium licence
2. git checkout master and navigate to a group
3. repeat 2.-5. from the project-level instructions

MR acceptance checklist

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