RFR: 8248404: AArch64: Remove uses of long and unsigned long [v6]

[Coleen Phillimore]

> Tested with mach5 on linux-aarch64 and macosx-aarch64 on tier1-3 and below GHA for windows-aarch64 (once I open this PR).

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Use UCONST64.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7023/files
  - new: https://git.openjdk.java.net/jdk/pull/7023/files/4edba83b..0877accb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7023&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7023&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7023.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7023/head:pull/7023

PR: https://git.openjdk.java.net/jdk/pull/7023