[Performance] Memoize cloudEnvironment check

[gonzaloriestra]

WHY are these changes introduced?

The cloudEnvironment function is called multiple times during the CLI execution to identify if it's running in a cloud IDE like Codespaces or Gitpod. These environment checks are static during the process lifetime.

WHAT is this pull request doing?

This PR memoizes the cloudEnvironment function result when using the default process.env. It also adds a reset utility for testing purposes.

How to test your changes?

CI

Post-release steps

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've considered analytics changes to measure impact
• The change is user-facing — I've identified the correct bump type (patch for bug fixes · minor for new features · major for breaking changes) and added a changeset with pnpm changeset add

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PR created automatically by Jules for task 5739118917641376805 started by @gonzaloriestra

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[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/public/node/context/local.d.ts

@@ -173,4 +173,8 @@ export declare function getThemeKitAccessDomain(env?: NodeJS.ProcessEnv): string
  * @returns The domain to send OTEL metrics to.
  */
 export declare function opentelemetryDomain(env?: NodeJS.ProcessEnv): string;
-export type CIMetadata = Metadata;
\ No newline at end of file
+export type CIMetadata = Metadata;
+/**
+ * Resets the cloud environment cache.
+ */
+export declare function _resetCloudEnvironmentCache(): void;
\ No newline at end of file