gh-114275: Revert "gh-108303: Move all doctest related files and tests to Lib/test/test_doctest/ (#112109)"

[sobolevn]

This reverts commit 9c93350.

I want to see the buildbot run, because right now there's no buildbot run for this commit:

• Issue: test_pdb broken under WASI #114275

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📚 Documentation preview 📚: https://cpython-previews--114283.org.readthedocs.build/

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @sobolevn for commit c3701e9 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[sobolevn]

Interesting, it worked: https://buildbot.python.org/all/#/builders/1061/builds/694

Now, let's test it again with my commit and some other changes applied.

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @sobolevn for commit 973510f 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[sobolevn]

Yes, it now fails: https://buildbot.python.org/all/#/builders/1061/builds/695

😮

[sobolevn]

!buildbot wasi*

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @sobolevn for commit 3a33b6a 🤖

The command will test the builders whose names match following regular expression: wasi*

The builders matched are:

• wasm32-wasi PR
• wasm32 WASI 8Core PR