feat(@angular-devkit/build-angular): implement node module license extraction for esbuild builder

[clydin]

When using the experimental esbuild-based browser application builder, the --extract-licenses
option will now generate an output licenses file when enabled. This option extracts license
information for each node module package included in the output files of the built code. This
includes JavaScript and CSS output files. The esbuild metafile information generated during the
bundling steps is used as the source of information regarding what input files where included and
where they are located. A path segment of node_modules is used to indicate that a file belongs
to a package and its license should be include in the output licenses file.

The package name and license field are extracted from the package.json file for the
package. If a license file (e.g., LICENSE) is present in the root of the package, it
will also be included in the output licenses file. Custom licenses as defined by the recommended
npm custom license text (SEE LICENSE IN <filename>) will also be extracted and included in the
output license file. For additional information regarding the license field in a package.json,
see https://docs.npmjs.com/cli/v9/configuring-npm/package-json#license.

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