RFR: 8330155: Serial: Remove TenuredSpace [v2]

[Guoxiong Li]

> Hi all,
> 
> This patch removes the class `TenuredSpace` and adjusts its usages. After removing `TenuredSpace`, the file `space.inline.hpp` is empty, so I remove this file and change the included header file to `space.hpp`.
> 
> The test `make test-tier1_gc` passed locally. Thanks for taking the time to review.
> 
> Best Regards,
> -- Guoxiong

Guoxiong Li has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Remove file.
 - Merge branch 'master' into REMOVE_TENURED_SPACE
   
   # Conflicts:
   #	src/hotspot/share/gc/serial/defNewGeneration.inline.hpp
 - JDK-8330155

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Changes: https://git.openjdk.org/jdk/pull/18894/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18894&range=01
  Stats: 161 lines in 20 files changed: 10 ins; 127 del; 24 mod
  Patch: https://git.openjdk.org/jdk/pull/18894.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18894/head:pull/18894

PR: https://git.openjdk.org/jdk/pull/18894