fix(nuxt): Delete Sentry-enabled source maps from Nitro output directories

[s1gr1d]

When Sentry enables 'hidden' source maps, it deleted them with folder-name globs like .*/**/public/**/*.map. As discussed in #25362, a static glob cannot know where a preset writes its output.

• Reads nitro.options.output.publicDir and serverDir instead (available since nitropack 2.6.1, Nuxt 3.7.0).
• Fixes client maps leaking in dist on Netlify and Cloudflare Pages, and keeps the server maps in dist/_worker.js.
• Keeps server maps enabled with nitro.rollupConfig.output.sourcemap.

Tested with unit tests on real files, and with new netlify and cloudflare-pages E2E variants.

[s1gr1d]

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