refactor(serde_v8): split ZeroCopyBuf into JsBuffer and ToJsBuffer (#19566)

`ZeroCopyBuf` was convenient to use, but sometimes it did hide details
that some copies were necessary in certain cases. Also it made it way to easy
for the caller to pass around and convert into different values. This commit
splits `ZeroCopyBuf` into `JsBuffer` (an array buffer coming from V8) and
`ToJsBuffer` (a Rust buffer that will be converted into a V8 array buffer).

As a result some magical conversions were removed (they were never used)
limiting the API surface and preparing for changes in #19534.

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/crypto/generate_key.rs b/ext/crypto/generate_key.rs
index 426c61376..9e2d14ea7 100644
--- a/ext/crypto/generate_key.rs
+++ b/ext/crypto/generate_key.rs
@@ -3,7 +3,7 @@
 use deno_core::error::AnyError;
 use deno_core::op;
 use deno_core::task::spawn_blocking;
-use deno_core::ZeroCopyBuf;
+use deno_core::ToJsBuffer;
 use elliptic_curve::rand_core::OsRng;
 use num_traits::FromPrimitive;
 use once_cell::sync::Lazy;
@@ -45,7 +45,7 @@ pub enum GenerateKeyOptions {
 #[op]
 pub async fn op_crypto_generate_key(
   opts: GenerateKeyOptions,
-) -> Result<ZeroCopyBuf, AnyError> {
+) -> Result<ToJsBuffer, AnyError> {
   let fun = || match opts {
     GenerateKeyOptions::Rsa {
       modulus_length,