devops: disable dchecks when building chromium (#8067)
devops: disable dchecks when building chromium (#8067)

As of https://chromium-review.googlesource.com/c/chromium/src/+/3053740,
Chromium defaults to building with dchecks always on.

We don't want dchecks enabled in our builds so we must disable them
explicitly.

References #8052
microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright,microsoft/playwright