Rollup of 6 pull requests

[tgross35]

Successful merges:

• Initial implementation of anonymous_pipe API #127153 (Initial implementation of anonymous_pipe API)
• impl Send + Sync and override count for the CStr::bytes iterator #127444 (impl Send + Sync and override count for the CStr::bytes iterator)
• Migrate dump-ice-to-disk and panic-abort-eh_frame run-make tests to rmake #127523 (Migrate dump-ice-to-disk and panic-abort-eh_frame run-make tests to rmake)
• std: Use read_unaligned for reads from DWARF #127792 (std: Use read_unaligned for reads from DWARF)
• Use futex.rs for Windows thread parking #127807 (Use futex.rs for Windows thread parking)
• Rename tcx to cx in rustc_type_ir #127810 (Rename tcx to cx in rustc_type_ir)

Failed merges:

• Prevent double reference in generic futex #127813 (Prevent double reference in generic futex)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup