Use Optional Chaining to `globalThis.process.env.NODE_ENV` Retrieval

[johnfabre]

This PR introduces optional chaining when accessing globalThis.process.env.NODE_ENV in the graphql-js codebase.

The current implementation assumes that globalThis.process.env is always defined, which may not be the case in all environments. This assumption leads to a runtime error when NODE_ENV is accessed on an undefined process.env.

By adding optional chaining (?.), we ensure that NODE_ENV is only accessed if globalThis.process and process.env are defined, thereby preventing potential runtime errors.

This change improves the robustness of the code and makes it more compatible with various JavaScript environments.

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[JoviDeCroock]

This is a duplicate of https://github.com/graphql/graphql-js/pull/4017

[johnfabre]

The committers listed above are authorized under a signed CLA.

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added myself to CLA

This is a duplicate of #4017

used the code suggested in here https://github.com/graphql/graphql-js/pull/4017/files#r1483265402

[JoviDeCroock]

Fixed with https://github.com/graphql/graphql-js/pull/4022