RFR: 8366331: Sort share/prims includes

[Francesco Andreuzzi]

This PR sorts the includes in `hotspot/share/prims` using `SortIncludes.java`, and removes some unnecessary ones. I'm also adding the directory to `TestIncludesAreSorted`.

Passes `tier1`.

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Commit messages:
 - sort and delete

Changes: https://git.openjdk.org/jdk/pull/26980/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26980&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366331
  Stats: 72 lines in 26 files changed: 31 ins; 39 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26980.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26980/head:pull/26980

PR: https://git.openjdk.org/jdk/pull/26980