Backport #148371 to the 21.x branch

[HighCommander4]

I would like to backport #148371 to the 21.x branch.

This is a small, low-risk change that tweaks how one of clangd's features (IncludeInserter) interprets a configuration option (AnglesHeaders/QuotedHeaders).

Including this in 21.x avoids shipping clangd 21 in a state where two different features interpret the configuration option in different ways (with IncludeInserter using the spelled path and include-cleaner using the resolved path).

cc @Harald-R

[llvmbot]

@llvm/issue-subscribers-clangd

Author: Nathan Ridge (HighCommander4)

I would like to backport #148371 to the 21.x branch.

This is a small, low-risk change that tweaks how one of clangd's features (IncludeInserter) interprets a configuration option (AnglesHeaders/QuotedHeaders).

Including this in 21.x avoids shipping clangd 21 in a state where two different features interpret the configuration option in different ways (with IncludeInserter using the spelled path and include-cleaner using the resolved path).

cc @Harald-R

[HighCommander4]

/cherry-pick ff0093c

[llvmbot]

/pull-request #152659