IS-6653: Personal access token docs have outdated screenshots

[Rutam21]

Summary

Personal Access Token page has outdated product screenshots which can be very confusing to the users. This PR adds the updated screenshots that align with the latest product and also includes additional screenshots in other sections that missed the visual references.

Ticket Link

This PR fixes https://github.com/mattermost/docs/issues/6653.

Checklist

• [x] This PR follows Mattermost Contributing Guidelines.

[mattermost-build]

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[Rutam21]

@cwarnermm Please review and suggest changes, if any. Thanks.

[github-actions[bot]]

Newest code from cwarnermm has been published to preview environment for Git SHA bb9b10ce39ce75dd72a7719393555eea679668cc

[cwarnermm]

This is a great update, @Rutam21! Thank you!

I'm probably being over-cautious, but I recommend that you hide additional details in the Manage Personal Tokens screenshot. I can almost make out your email address (which you likely don't want visible at all), and I also recommend blurring out some or all of the Token ID.

[Rutam21]

@cwarnermm Thanks for the suggestion. I have blurred those details to the maximum extent and updated the screenshot. Also, for safety reasons, I deleted that token after raising the PR.

[cwarnermm]

@amyblais - Looking for a second approval to merge. Thanks!

[amyblais]

@cwarnermm Approved!