Refactor snapshot build (#2825)

Instead of using core/snapshot_creator.rs, instead two crates are
introduced which allow building the snapshot during build.rs.

Rollup is removed and replaced with our own bundler. This removes
the Node build dependency. Modules in //js now use Deno-style imports
with file extensions, rather than Node style extensionless imports.

This improves incremental build time when changes are made to //js files
by about 40 seconds.

1 files changed, 0 insertions, 12 deletions

diff --git a/core/BUILD.gn b/core/BUILD.gn
index 0f1eba8ca..bf9d910c0 100644
--- a/core/BUILD.gn
+++ b/core/BUILD.gn
@@ -7,7 +7,6 @@ group("default") {
     ":deno_core_http_bench",
     ":deno_core_http_bench_test",
     ":deno_core_test",
-    ":snapshot_creator",
   ]
 }
 
@@ -78,14 +77,3 @@ rust_test("deno_core_http_bench_test") {
   extern = http_bench_extern
   extern_rlib = http_bench_extern_rlib
 }
-
-rust_executable("snapshot_creator") {
-  source_root = "snapshot_creator.rs"
-  extern = [
-    {
-      label = ":deno"
-      crate_name = "deno"
-      crate_type = "rlib"
-    },
-  ]
-}