RFR: 8364618: Sort share/code includes

[Francesco Andreuzzi]

This PR sorts the includes in `hotspot/share/code` using `SortIncludes.java`. I'm also adding the directory to `TestIncludesAreSorted`.

Passes tier1.

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Commit messages:
 - sort

Changes: https://git.openjdk.org/jdk/pull/26616/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26616&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364618
  Stats: 24 lines in 7 files changed: 12 ins; 12 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26616.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26616/head:pull/26616

PR: https://git.openjdk.org/jdk/pull/26616