Updates in Mongodb atlas, Tracing and fedramp docs

[himanshu219]

Purpose of this pull request

This pull request

• updates fedramp capabilities section.
• updates mongodb atlas collection docs.
• updates v2 app install / upgrade / uninstall instructions for tracing/rum apps.

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

[jpipkin1]

Approved, @himanshu219. I made some minor changes to the MongoDB Atlas article, mostly to list numbering and screenshot tagging (see commit "Updates from review").

[himanshu219]

Thanks @jpipkin1 the border and fixed width to images looks nice! should we follow the same standard for future docs?

[jpipkin1]

Yes, @himanshu219, you should follow the same standard for future docs. See the example code snippet in the Images section of our style guide.