Checks that cause the doc-gen to fail were already disabled in `docs-watch`
for the doc-gen that runs when a file is changed.
Now these checks are also disabled for the initial doc-gen run.
closes#20038
This helps to ensure that the full docs have been
generated before we begin watching.
You can disable this by providing the `--watch-only`
flag. E.g. `yarn docs-watch -- --watch-only`.