feat: replace old term "Lexical Environment" with "Environment Record"

[andrew1931]

Here are links to ECMAScript2020 and ECMAScript2023.

There is no such term as "Lexical Environment" anymore (only "LexicalEnvironment" component as a state of an execution context).

All "Lexical Environment" terms were replaced with "Environment Record" all over the "Executable Code and Execution Contexts" article.

[CLAassistant]

All committers have signed the CLA.

[iliakan]

I'm glad they finally did it in the standard.

It'll be much easier to describe. Need to rewrite the article and pics =)

[shallow-beach]

this article is definitely a prime target