Cleanup linter annotations for remote dev domain

What does this MR do and why?

Cleans up linter annotations for remote dev domain:

• Cleanup/update noinspection comments. See https://handbook.gitlab.com/handbook/tools-and-tips/editors-and-ides/jetbrains-ides/code-inspection for more context.
• Fix other minor linter errors.
• Fix other minor formatting.

Also updated list of resolved issues. See Update jetbrains issues with closed status (gitlab-com/content-sites/handbook!6346 - merged)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

How to set up and validate locally

• Setup RubyMine according to handbook: https://handbook.gitlab.com/handbook/tools-and-tips/editors-and-ides/jetbrains-ides/setup-and-config/
• Set up the remote dev scope: https://handbook.gitlab.com/handbook/tools-and-tips/editors-and-ides/jetbrains-ides/code-inspection/#using-inspect-code-with-custom-scopes
• Run Inspect code for the remote dev scope, and ensure there are no warnings or errors.