fix: delete status code checking

[cbosss]

When deleting via the edge, a successful status code is 204. We weren't classifying this as successful and throwing errors like:

Nov 6, 10:20:08 PM: cc534af9 ERROR Invoke Error {"errorType":"BlobsInternalError","errorMessage":"Netlify Blobs has generated an internal error: 204 response","name":"BlobsInternalError","stack":["BlobsInternalError: Netlify Blobs has generated an internal error: 204 response"," at _Store.delete (/var/task/node_modules/@netlify/blobs/dist/main.cjs:263:13)"," at process.processTicksAndRejections (node:internal/process/task_queues:95:5)"," at async Object.netliblob_default (/var/task/functions/netliblob.cjs:51:7)"," at async Runtime.handler (file:///var/task/___netlify-bootstrap.mjs:1847:15)"," at async Runtime.handleOnceStreaming (file:///var/runtime/index.mjs:1206:26)"]}

Here's the docs.

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[eduardoboucas]

Great, thanks!