Rename experimental.resolveAlias to experimental.turbopackResolveAlias (

vercel/turborepo#3651)

Following discussion at #45560,
this renames `experimental.resolveAlias` to
`experimental.turbopackResolveAlias` to make it clear that this option
is only available in Turbopack.

Test Plan: `cargo test -p next-dev-tests`

crates/next-core/src/next_config.rs

@@ -244,9 +244,9 @@ pub enum RemotePatternProtocal {
 #[serde(rename_all = "camelCase")]
 pub struct ExperimentalConfig {
     pub app_dir: Option<bool>,
-    pub resolve_alias: Option<IndexMap<String, JsonValue>>,
     pub server_components_external_packages: Option<Vec<String>>,
     pub turbopack_loaders: Option<IndexMap<String, WebpackLoaderConfigs>>,
+    pub turbopack_resolve_alias: Option<IndexMap<String, JsonValue>>,
 
     // unsupported
     adjust_font_fallbacks: Option<bool>,
@@ -414,7 +414,7 @@ impl NextConfigVc {
     #[turbo_tasks::function]
     pub async fn resolve_alias_options(self) -> Result<ResolveAliasMapVc> {
         let this = self.await?;
-        let Some(resolve_alias) = this.experimental.resolve_alias.as_ref() else {
+        let Some(resolve_alias) = this.experimental.turbopack_resolve_alias.as_ref() else {
             return Ok(ResolveAliasMapVc::cell(ResolveAliasMap::default()));
         };
         let alias_map: ResolveAliasMap = resolve_alias.try_into()?;

crates/next-dev-tests/tests/integration/next/resolve-alias/basic/input/index.js

@@ -1,10 +1,10 @@
 import foo from "foo";
 import foo2 from "foo2";
 
-it("aliases foo to bar through the next.config.js experimental.resolveAlias property", () => {
+it("aliases foo to bar through the next.config.js experimental.turbopackResolveAlias property", () => {
   expect(foo).toBe(42);
 });
 
-it("aliases foo2 to bar through the next.config.js experimental.resolveAlias property with export condition", () => {
+it("aliases foo2 to bar through the next.config.js experimental.turbopackResolveAlias property with export condition", () => {
   expect(foo2).toBe(42);
 });

crates/next-dev-tests/tests/integration/next/resolve-alias/basic/input/next.config.js

@@ -1,6 +1,6 @@
 module.exports = {
   experimental: {
-    resolveAlias: {
+    turbopackResolveAlias: {
       foo: ["bar"],
       foo2: { browser: "bar" },
     },