fix(ngcc): support simple browser property in entry-points (#36396)

The `browser` package.json property is now supported to the same
level as `main` - i.e. it is sniffed for UMD, ESM5 and CommonJS.

The `browser` property can also contain an object with file overrides
but this is not supported by ngcc.

Fixes #36062

PR Close #36396

packages/compiler-cli/ngcc/test/integration/ngcc_spec.ts

@@ -793,7 +793,7 @@ runInEachFileSystem(() => {
            const propertiesToConsider = ['es1337', 'fesm42'];
            const errorMessage =
                'No supported format property to consider among [es1337, fesm42]. Supported ' +
-               'properties: fesm2015, fesm5, es2015, esm2015, esm5, main, module';
+               'properties: fesm2015, fesm5, es2015, esm2015, esm5, main, module, browser';
 
            expect(() => mainNgcc({basePath: '/node_modules', propertiesToConsider}))
                .toThrowError(errorMessage);