RFR: 8340731: Cleanup remaining IA64 references in hotspot code

[Amit Kumar]

This PR cleans up `IA64` entries form hotspot codebase. 

As mentioned in the JBS, I left `zero` component as-it-is: 

./cpu/zero/bytecodeInterpreter_zero.hpp:31:#if defined(PPC) || defined(IA64)
./os_cpu/linux_zero/os_linux_zero.cpp:350:#ifdef IA64
./os_cpu/linux_zero/os_linux_zero.cpp:351:    // IA64 has two stacks sharing the same area of memory, a normal
./os_cpu/linux_zero/os_linux_zero.cpp:360:#endif // IA64


Fastdebug VM Build on Mac-M1 & Linux/s390x is fine. Tests are in progress.

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Commit messages:
 - cleanup

Changes: https://git.openjdk.org/jdk/pull/22382/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22382&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340731
  Stats: 81 lines in 17 files changed: 4 ins; 56 del; 21 mod
  Patch: https://git.openjdk.org/jdk/pull/22382.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22382/head:pull/22382

PR: https://git.openjdk.org/jdk/pull/22382