Fix error handling in `Modules/_interpchannelsmodule.c`

[sobolevn]

Crash report

@serhiy-storchaka requested to double check this in #151239 (review) several weeks ago.

It might contain error handling issues.

Also mentioned in https://gist.github.com/devdanzin/bf6f784d4bcd21acd471ea45b6f23c70 as OOM-0026
Refs #151763

I will send a PR.

Linked PRs

• gh-152156: Fix a crash in interpeters.create under limited memory conditions #152163
• [3.14] gh-152156: Fix a crash in interpeters.create under limited memory conditions (GH-152163) #152268
• [3.15] gh-152156: Fix a crash in interpeters.create under limited memory conditions (GH-152163) #152269
• [3.13] gh-152156: Fix a crash in interpeters.create under limited memory conditions (GH-152163) #152270