fix: ensure `--build-output` destination exists

[szymonrybczak]

Summary:

Replicates https://github.com/react-native-community/cli/commit/48d4c29bba4e8b16cbc8307bd1b4c5349f3651d8, which landed inside cli-plugin-metro inside RNC CLI, but because of migration of code to community-cli-plugin it looks like apparently the fix wasn't replicated.

Changelog:

[GENERAL] [FIXED] - Ensure --build-output destination exists

Test Plan:

Specify a new directory that doesn't exists inside --build-output:

npx react-native bundle --build-output dist/new-dir/index.bundle

and this command shouldn't fail.

[szymonrybczak]

cc @tido64 just FYI

[facebook-github-bot]

@huntie has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@huntie merged this pull request in facebook/react-native@396bdd87d8021902ad78b817314fdc5b6207c2ea.

[react-native-bot]

This pull request was successfully merged by @szymonrybczak in 396bdd87d8021902ad78b817314fdc5b6207c2ea

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