chore(env): add VERCEL_ENV into default global env map (#9635)

### Description

Include `VERCEL_ENV` as an environment variable that affects the global
hash. Can be opted out by specifying `!VERCEL_ENV` in `globalEnv`.

### Testing Instructions

Unit test, quick manual test as a smoke test:
```
[0 olszewski@chriss-mbp] /tmp/env-var $ VERCEL_ENV=dev turbo_dev --skip-infer build --output-logs=hash-only --ui=stream
turbo 2.3.4-canary.4

• Packages in scope: @repo/eslint-config, @repo/typescript-config, @repo/ui, docs, web
• Running build in 5 packages
• Remote caching disabled
web:build: cache miss, executing 7a2bad92132801df
docs:build: cache miss, executing 744d362ee9e1eb1b

 Tasks:    2 successful, 2 total
Cached:    0 cached, 2 total
  Time:    13.166s 

[0 olszewski@chriss-mbp] /tmp/env-var $ VERCEL_ENV=dev turbo_dev --skip-infer build --output-logs=hash-only --ui=stream
turbo 2.3.4-canary.4

• Packages in scope: @repo/eslint-config, @repo/typescript-config, @repo/ui, docs, web
• Running build in 5 packages
• Remote caching disabled
docs:build: cache hit, suppressing logs 744d362ee9e1eb1b
web:build: cache hit, suppressing logs 7a2bad92132801df

 Tasks:    2 successful, 2 total
Cached:    2 cached, 2 total
  Time:    108ms >>> FULL TURBO

[0 olszewski@chriss-mbp] /tmp/env-var $ VERCEL_ENV=prod turbo_dev --skip-infer build --output-logs=hash-only --ui=stream
turbo 2.3.4-canary.4

• Packages in scope: @repo/eslint-config, @repo/typescript-config, @repo/ui, docs, web
• Running build in 5 packages
• Remote caching disabled
web:build: cache miss, executing b138cc0b45044f36
docs:build: cache miss, executing 0149788cd6331b71

 Tasks:    2 successful, 2 total
Cached:    0 cached, 2 total
  Time:    9.355s
```

Author: chris-olszewski

crates/turborepo-env/src/lib.rs

@@ -13,7 +13,7 @@ use thiserror::Error;
 
 pub mod platform;
 
-const DEFAULT_ENV_VARS: [&str; 1] = ["VERCEL_ANALYTICS_ID"];
+const DEFAULT_ENV_VARS: &[&str] = ["VERCEL_ANALYTICS_ID", "VERCEL_ENV"].as_slice();
 
 #[derive(Clone, Debug, Error)]
 pub enum Error {
@@ -22,7 +22,7 @@ pub enum Error {
 }
 
 // TODO: Consider using immutable data structures here
-#[derive(Clone, Debug, Default, Serialize)]
+#[derive(Clone, Debug, Default, Serialize, PartialEq)]
 #[serde(transparent)]
 pub struct EnvironmentVariableMap(HashMap<String, String>);
 
@@ -278,7 +278,7 @@ pub fn get_global_hashable_env_vars(
     env_at_execution_start: &EnvironmentVariableMap,
     global_env: &[String],
 ) -> Result<DetailedMap, Error> {
-    let default_env_var_map = env_at_execution_start.from_wildcards(&DEFAULT_ENV_VARS[..])?;
+    let default_env_var_map = env_at_execution_start.from_wildcards(DEFAULT_ENV_VARS)?;
 
     let user_env_var_set =
         env_at_execution_start.wildcard_map_from_wildcards_unresolved(global_env)?;
@@ -335,4 +335,27 @@ mod tests {
             assert_eq!(actual.get("Turbo"), None);
         }
     }
+
+    #[test_case(&[], &["VERCEL_ANALYTICS_ID", "VERCEL_ENV"] ; "defaults")]
+    #[test_case(&["!VERCEL*"], &[] ; "removing defaults")]
+    #[test_case(&["FOO*", "!FOOD"], &["FOO", "FOOBAR", "VERCEL_ANALYTICS_ID", "VERCEL_ENV"] ; "intersecting globs")]
+    fn test_global_env(inputs: &[&str], expected: &[&str]) {
+        let env_at_start = EnvironmentVariableMap(
+            vec![
+                ("VERCEL_ENV", "prod"),
+                ("VERCEL_ANALYTICS_ID", "1"),
+                ("FOO", "bar"),
+                ("FOOBAR", "baz"),
+                ("FOOD", "cheese"),
+            ]
+            .into_iter()
+            .map(|(k, v)| (k.to_owned(), v.to_owned()))
+            .collect(),
+        );
+        let inputs = inputs.iter().map(|s| s.to_string()).collect::<Vec<_>>();
+        let actual = get_global_hashable_env_vars(&env_at_start, &inputs).unwrap();
+        let mut actual = actual.all.keys().map(|s| s.as_str()).collect::<Vec<_>>();
+        actual.sort();
+        assert_eq!(actual, expected);
+    }
 }