[llvm] [clang-tools-extra] [lldb] [compiler-rt] [flang] [clang] [mlir] [Profile] Add binary profile correlation for code coverage. (PR #69493)

[Zequan Wu via cfe-commits]

ZequanWu wrote:

> Some further discussion/pre-work needed before proceeding with this PR.

These two discussions are addressed and this is ready to be reviewed.

1. Support for merging with multiple correlation files will be done in a separate change.
2. Removed the `VARIANT_MASK_BIN_CORRELATE` and runtime check for it to determine if name/data sections should be skipped. Instead, new section names are used (`__llvm_covdata` and `__llvm_covnames`).

https://github.com/llvm/llvm-project/pull/69493