build: switch from rollup and terser to esbuild for creating contract bundle (angular#55705)

This commit implements the replacement of rollup and terser with esbuild for generating the contract_bundle binary. The transition is facilitated by optimizations aimed at reducing the bundle size. PR Close angular#55705

Author: alan-agius4

packages/core/BUILD.bazel

@@ -148,5 +148,5 @@ genrule(
  name = "event_dispatch_contract_binary",
  srcs = ["//packages/core/primitives/event-dispatch:contract_bundle_min"],
  outs = ["event-dispatch-contract.min.js"],
- cmd = "cat $< >> $@",
+ cmd = "cp $< $@",
 )

packages/core/primitives/event-dispatch/BUILD.bazel

@@ -1,6 +1,4 @@
-load("//tools:defaults.bzl", "ts_library", "tsec_test")
-load("@npm//@bazel/rollup:index.bzl", "rollup_bundle")
-load("@npm//@bazel/terser:index.bzl", "terser_minified")
+load("//tools:defaults.bzl", "esbuild", "ts_library", "tsec_test")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -29,17 +27,18 @@ filegroup(
  visibility = ["//visibility:public"],
 )
 
-rollup_bundle(
- name = "contract_bundle",
- args = ["--no-sourcemap"],
+esbuild(
+ name = "contract_bundle_min",
+ args = {
+ "sourcemap": False,
+ "resolveExtensions": [
+ ".mjs",
+ ],
+ "legalComments": "none",
+ },
  entry_point = ":contract_binary.ts",
  format = "iife",
+ minify = True,
+ sourcemap = "inline",
  deps = [":event-dispatch"],
 )
-
-terser_minified(
- name = "contract_bundle_min",
- src = ":contract_bundle",
- config_file = ":terser.config.json",
- sourcemap = False,
-)