Give better errors for some permission issues

[deivid-rodriguez]

What was the end-user or developer problem that led to this PR?

Sometimes bundler fails to do what it needs to do regarding some file operations like creating the gem folder where a gem will be installed, or deleting the previous installation. In some of those cases, bundler fails to report a proper error and instead prints a bug report template with a different error at random places.

What is your fix for the problem, implemented in this PR?

The fix is to properly detect where the actual problem happens, and give a proper error.

Closes #4888.
Closes #4938.
Closes #4939.
Closes #4981.

Make sure the following tasks are checked

• Describe the problem / feature
• Write tests for features and bug fixes
• Write code to solve the problem
• Make sure you follow the current code style and write meaningful commit messages without tags

[deivid-rodriguez]

I'd like to ask for some opinions here. Is it to much to automatically grant permissions on the installation folder if we can?

[deivid-rodriguez]

This a weird MacOS failure (only happens on 2.5, 2.6, and 2.7, but not on 3.0) that I need to investigate. But in addition to that, I'm going to tweak the fix.

I think it's fine that bundler tries to automatically fix permissions so that it's able to delete an existing gem folder before reinstalling a gem. But this shouldn't be the default FileUtils.rm_rf behaviour, since it should just be a wrapper on top of rm -rf and not deviate from the standard shell behavior.

So for now, I won't be changing fileutils at all. Instead, I will check whether the folder has actually been removed after FileUtils.rm_rf and if not, retry with fixed permissions.

[deivid-rodriguez]

I updated this PR with the more minimal approach to improve the issue. We don't automatically try to fix any permissions for now, but we now give a proper error instead of throwing a bug report template at random places.

I'm setting this PR to close all permission issues. We'll probably get new issues but with better errors where the culprit will be easier to investigate and what to do about them will be more clear.