deprecate `@_(no)inline_meta` in favor of no-arg `@(no)inline` (#41323)
v1.8 will publicly support these annotations within a function body
and so we can replace all the usages of `@_inline_meta` and
`@_noinline_meta` with each no-arg version.
We may want to deprecate them rather than remove entirely them though,
since I found a quite few packages rely on these "internal" macros...
- <https://juliahub.com/ui/Search?q=%40_inline_meta&type=code>
- <https://juliahub.com/ui/Search?q=%40_noinline_meta&type=code>