directives doesn't have mappings in source map

esbuild does not output source mapping for directives. babel and SWC both output them and I expect it to be output.

[esbuild try](https://esbuild.github.io/try/#dAAwLjE5LjkALS1zb3VyY2VtYXA9ImlubGluZSIAJ3VzZSBjbGllbnQnOwoKY29uc29sZS5sb2coJ2ZvbycpOwo) ([sourcemap visualization](https://evanw.github.io/source-map-visualization/#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))

[babel](https://stackblitz.com/edit/babel-sapphi-red-template-vakqym?file=package.json,build.js,input.js) ([sourcemap visualization](https://evanw.github.io/source-map-visualization/#MzU0ACd1c2UgY2xpZW50JzsNCg0KY29uc29sZS5sb2coJ2ZvbycpOw0KLy8jIHNvdXJjZU1hcHBpbmdVUkw9ZGF0YTphcHBsaWNhdGlvbi9qc29uO2NoYXJzZXQ9dXRmLTg7YmFzZTY0LGV5SjJaWEp6YVc5dUlqb3pMQ0p1WVcxbGN5STZXeUpqYjI1emIyeGxJaXdpYkc5bklsMHNJbk52ZFhKalpYTWlPbHNpZFc1cmJtOTNiaUpkTENKemIzVnlZMlZ6UTI5dWRHVnVkQ0k2V3lJbmRYTmxJR05zYVdWdWRDYzdYSEpjYmx4eVhHNWpiMjV6YjJ4bExteHZaeWduWm05dkp5azdYSEpjYmlKZExDSnRZWEJ3YVc1bmN5STZJa0ZCUVVFc1dVRkJXVHM3UVVGRldrRXNUMEZCVHl4RFFVRkRReXhIUVVGSExFTkJRVU1zUzBGQlN5eERRVUZESW4wPTE4OAB7InZlcnNpb24iOjMsIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwic291cmNlcyI6WyJ1bmtub3duIl0sInNvdXJjZXNDb250ZW50IjpbIid1c2UgY2xpZW50JztcclxuXHJcbmNvbnNvbGUubG9nKCdmb28nKTtcclxuIl0sIm1hcHBpbmdzIjoiQUFBQSxZQUFZOztBQUVaQSxPQUFPLENBQUNDLEdBQUcsQ0FBQyxLQUFLLENBQUMifQ==))
[swc](https://play.swc.rs/?version=1.3.100&code=H4sIAAAAAAAAA1MvLU5VSM7JTM0rUbfm5eLlSs7PK87PSdXLyU%2FXUE%2FLz1fXBAoDANO4gEAmAAAA&config=H4sIAAAAAAAAA1WPSw6DMAxE95wCed1FxaIL7sAhrNSgoPxkB6kIcfcmkNCyi9%2FMZOytaVuYRUHfbumZhoAsxNeciKwu4icRIGVRFOsQ4VHVWbI0ohE60H4qEJEnikdKumfXlQQY74VqojCrnR7X%2F07lbWASuRuzFd1k6N7YlFaw%2Fr0cYrklroHODV7wM9Wy62PQMtRk5OVk4hdWNGDIO4B2RjuCZv8CUFCpdDEBAAA%3D) ([sourcemap visualization](https://evanw.github.io/source-map-visualization/#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))

#### Additional context
Rollup outputs a warning for directives other than `use strict` (e.g. `use client`) because it doesn't know about the semantics for that. Vite uses esbuild to transform a file and feeds it to Rollup with source map. Then, Rollup output the warning because the input file has `use client` and tries to map the position to the original position using the source map generated by esbuild. But because the source map doesn't contain the mapping for the directive, Rollup fails to output the warning with the original position.

original issue: https://github.com/vitejs/vite/issues/15012

Start with the linked esbuild try case and compare its source map with the Babel and SWC visualizations. No source files or tests are named, so trace esbuild's source-map generation for JavaScript directives and add coverage for the reported input. Done means directive positions are represented so downstream tools can recover the original location.

Written by the indexing model from the issue text.