Enable --include-iree-libs fetch and -DTHEROCK_ENABLE_IREE_LIBS build by default (#5093)

## Motivation

Multi-arch CI is now enabled by default in TheRock, so we should make
the default for developers match what CI is doing.

See:
* #3337
* iree-org/fusilli#57
* ROCm/rocm-libraries#6903

## Technical Details

* This will add 45s+ to initial clone time when using the legacy fetch
options.
* Repositories that have not yet migrated to the `--stage` mode of
fetching sources will pay this extra cost if they don't explicitly
opt-out of the new setting.
* This will enable a few new subproject builds (IREE's LLVM, fusilli,
etc.) by default which are already enabled for multi-arch CI.
* Repositories that have not yet migrated to multi-arch CI may want to
opt-out with `-DTHEROCK_ENABLE_ALL=OFF -DTHEROCK_ENABLE_*=ON` for some
subset (as rocm-libraries already does) or
`-DTHEROCK_ENABLE_IREE_LIBS=OFF`
* The `iree-compiler` artifact is still annotated with
`disable_platforms = ["windows"]` in `BUILD_TOPOLOGY.toml`, so the
builds remain disabled there

## Test Plan

* Multi-arch CI on this PR
* Non-multi-arch CI on this PR (watch fetch time and build time, see how
non-multi-arch CI in other repositories may want to adapt)
  * https://github.com/ROCm/TheRock/actions/runs/25464273855?pr=5093
*
https://therock-ci-artifacts-external.s3.amazonaws.com/ROCm-TheRock/25464273855-linux/logs/gfx94X-dcgpu/index.html
*
https://therock-ci-artifacts-external.s3.amazonaws.com/ROCm-TheRock/25464273855-linux/logs/gfx94X-dcgpu/iree-compiler_build.log
(~5 minutes to build iree-compiler)

## Submission Checklist

- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

Author: ScottTodd

CMakeLists.txt

@@ -248,10 +248,9 @@ option(THEROCK_ENABLE_ML_LIBS "Enable building of ML libraries" "${THEROCK_ENABL
 option(THEROCK_ENABLE_PROFILER "Enable building the profiler libraries" "${THEROCK_ENABLE_ALL}")
 option(THEROCK_ENABLE_DC_TOOLS "Enable building of data center tools" "${THEROCK_ENABLE_ALL}")
 option(THEROCK_ENABLE_MEDIA_LIBS "Enable building of Media libraries" "${THEROCK_ENABLE_ALL}")
+option(THEROCK_ENABLE_IREE_LIBS "Enable building of IREE libraries" "${THEROCK_ENABLE_ALL}")
 option(THEROCK_ENABLE_HOST_MATH "Build all bundled host math libraries by default" OFF)
 option(THEROCK_RESET_FEATURES "One-shot flag which forces all feature flags to their default state for this configuration run" OFF)
-# TODO(iree-org/fusilli/issues/57): Enable fusilli build once multi-arch support lands.
-option(THEROCK_ENABLE_IREE_LIBS "Enable building of IREE libraries" OFF)
 
 ################################################################################
 # Artifact-based features are auto-generated from BUILD_TOPOLOGY.toml

build_tools/fetch_sources.py

@@ -886,7 +886,7 @@ def main(argv):
     )
     parser.add_argument(
         "--include-iree-libs",
-        default=False,
+        default=True,
         action=argparse.BooleanOptionalAction,
         help="Include IREE and related libraries",
     )