RFR (XS): 8217203: Some more includes to .inline.hpp files in gc header files

[Thomas Schatzl]

Hi all,

  over time some gc hpp files started directly including .inline.hpp
files again.

Fix this to avoid future dependency messes.

I fixed one of the problems in shenandoah files because it was easy -
the one in shenandoahTaskqueue.hpp has been split into an extra CR (
https://bugs.openjdk.java.net/browse/JDK-8217213) as it started getting
complicated fixing wrong includes there.

CR:
https://bugs.openjdk.java.net/browse/JDK-8217203
Webrev:
http://cr.openjdk.java.net/~tschatzl/8217203/webrev/
Testing:
local compilation, building in CI

Thanks,
  Thomas