Most of these were fixed in other PRs but there were are couple of stragglers.
Note that `my-app` components in non-documentation facing code, such as
compliance tests have not been changed.
Fixes#20235
PR Close#42256
Various targets have their template type-checking disabled in the past.
There is no reason for this any more.
The only target that was tricky was packages/examples/core:core_examples
which was quite broken and I had to fix it up.
Template typechecking is still disabled under blaze, see FW-1753 for more
info.
PR Close#34144