Ability to jump to diff in an MR

Description

As a development lead, the most important part of the merge request in many ways is the diff. So if there's a long page to scroll through (lots of detail in the Markdown, etc.) to get to the diff that can lead to a bad experience. Depending on a number of factors, this scroll is an indeterminate amount as well

Proposal

Create the ability to "jump" to the discussions, diff, etc. from the top of the MR.

Links / references

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