fix(@angular-devkit/build-angular): add es2015 exports package condition to browser-esbuild #23221
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The
es2015
exports package condition is used byrxjs
to allow bundlers to use the ES2015-basedESM code instead of the default of ES5-based ESM code. The ES5-based ESM code is larger in size
and harder to optimize due to the downlevelled classes. This change results in a ~5Kb size reduction
for the main bundle of a new application (129920 -> 124183).