[clang-tools-extra] [clangd][modules] Provide correct context to ModulesBuilder::hasRequiredModules() call (PR #201419)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

> To test this patch we need a complex lit test with .clangd, modules, compile command with some flags which we need to drop using edits from .clangd. 

I don't feel this is too bad. We can use split-file to put multiple files into a single test. We have lit test in clang more than thousands lines of code. So I feel better with a test

https://github.com/llvm/llvm-project/pull/201419