Document new location of dev_utils/ and make clang-tidy work again.

The paths in the clang-tidy scripts needed to be adapted.

PiperOrigin-RevId: 668197340

Move some developer-specific tools from xls/tools to xls/dev_tools.

Also move "dump_llvm_artifacts_main" to dev_tools. Some tools still need to be moved over, but this is good for the first batch.

PiperOrigin-RevId: 667783815

Make the xls_ir_equivalence_test rule actually function as a test.

Previously the test would always be considered passing because the checker exited 0 in all circumstances. Make the checker exit non-zero (255) if the expected outcome is not seen.

PiperOrigin-RevId: 666993715

Add a dslx proc example for a simple memory interface.

Also helps to identify issue with
https://github.com/google/xls/pull/1545

#xls-build-gardener

PiperOrigin-RevId: 666531259

Merge pull request #1550 from antmicro:64294-fix-frame-header-tests

PiperOrigin-RevId: 666198879

block_evaluator_test_base uses absl::StatusCode. Add include.

#xls-build-gardener

PiperOrigin-RevId: 665562059

Merge pull request #1548 from xlsynth:cdleary/2024-08-18-enum-alias

PiperOrigin-RevId: 665048673

Add the ability to replace nodes while cloning an AST.

This will be useful for implementing unroll_for! and replacing the loop variable refs in the body.

Retrofit the preservation of type definitions to use this mechanism.

PiperOrigin-RevId: 663935817

modules/zstd: fix oss export

PiperOrigin-RevId: 663559924

In the fuzzer/ast generator, add simple tuple destructuring in `let` …