Trim down supported file extensions on Windows and Linux

[ccordoba12]

• Spyder is basically a Python based editor, so there's no need to set it as the default for a lot of extensions we don't really support.
• See Spyder 6.0.0rc2 Windows Standalone installer seems to be making changes to the Windows Registry breaking the cmd.exe association with .cmd and .bat files spyder-ide/spyder#22389 for the problems the previous associations can introduce.

Fixes spyder-ide/spyder#22389.

[conda-forge-webservices]

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I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[ccordoba12]

@mrclary, could you take a look at this one? Thanks!

[mrclary]

Let me take a look at this. I agree that Spyder should not be the default application, but it should be in the "Open with..." context menu and these files should be openable from a Spyder open-file dialogue.

[mrclary]

@ccordoba12, I still need to test this PR, but at least the trailing commas in lists need to be removed, otherwise JSONDecodeError results.

[ccordoba12]

@mrclary, this is ready for another review.

[mrclary]

Looks good to me; thanks @ccordoba12

[github-actions]

Hi! This is the friendly conda-forge automerge bot!

I considered the following status checks when analyzing this PR:

• linter: passed
• azure: passed

Thus the PR was passing and merged! Have a great day!