PR: Give more descriptive names to the shortcuts that control the Debugger

[ccordoba12]

Description of Changes

• This is necessary since now that those shortcuts are global (i.e. not prefixed by "debugger"), it was difficult to understand what a shortcut about "next" or "continue" referred to in Preferences.
• Also, make shortcut to debug a file global because that's how things worked in Spyder 5 and fix a test related to filtering shortcuts with the word "debug".

Issue(s) Resolved

Follow-up of PR #23452.

Affirmation

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[ccordoba12]

@meeseeksdev please backport to 6.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 6.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 0a187a7e48e46f6904157ca05e0d5a3880490180

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #23562: PR: Give more descriptive names to the shortcuts that control the Debugger'

4. Push to a named branch:

git push YOURFORK 6.x:auto-backport-of-pr-23562-on-6.x

5. Create a PR against branch 6.x, I would have named this PR:

"Backport PR #23562 on branch 6.x (PR: Give more descriptive names to the shortcuts that control the Debugger)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.