Show output of the size command in size test scripts

[swolchok]

I find this more useful than raw file size, because it breaks down size by section of the binary and splits out debug info.

[swolchok]

Stack from ghstack (oldest at bottom):

• outline input validation in elementwise_util #12031
• Specialize BroadcastIndexesRange for the case where there is only 1 contiguous input #12023
• Build size_test binaries with debug info #12019
• Detect release builds by comparing CMAKE_BUILD_TYPE to Debug, not Release #12045
• -> Show output of the size command in size test scripts #12018
• Unbreak build_size_test.sh (-Wvla-cxx-extension) on my local machine #12017

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12018

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• VolumeLimitExceeded Issue for linux.2xlarge and linux.4xlarge

✅ No Failures

As of commit 1ae275b with merge base 8bc99d3 ():
💚 Looks good so far! There are no failures yet. 💚

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[swolchok]

noting CI is green before starting stack land