RFR: 8297729: Replace GrowableArray in ComputeMoveOrder with hash table [v3]

[Jorn Vernee]

> Replaces the GrowableArray 'table' in ComputeMoveOrder with a real hash table.
> 
> Through testing, I found that sometimes this array is blown up to several thousand elements, most of which are `NULL`. Using a hash table prevents this large wastage.
> 
> I've touched up some of the surrounding code as well. Mostly style changes, but I've also removed the `BasicType` field from the `Move` and `MoveOperation` structs, since it was unused, and added frame data storages to the fast path for stack args as well, since both are allocated on the stack.
> 
> Testing: `jdk_foreign` test suite.

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

 - Drop redundant friend decl
 - improve hash slightly
 - Use hashtable in ComputeMoveOrder + general cleanup

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Changes: https://git.openjdk.org/jdk/pull/11392/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11392&range=02
  Stats: 61 lines in 2 files changed: 20 ins; 10 del; 31 mod
  Patch: https://git.openjdk.org/jdk/pull/11392.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11392/head:pull/11392

PR: https://git.openjdk.org/jdk/pull/11392