[vm] Globals cleanup `TARGET_ARCH_IS_*`
[vm] Globals cleanup `TARGET_ARCH_IS_*`

There were two sets of defines of `TARGET_ARCH_IS_*` in `globals.h`.

`IS_SIMARM_X64` implies `TARGET_ARCH_ARM` implies
`TARGET_ARCH_IS_32_BIT`, so the second set of defines can be removed.

Closes https://github.com/dart-lang/sdk/issues/44177.

TEST=The build on all configurations.

Change-Id: I9f8d5ce9ebc7186c4fb36a7d8acbc6c0165c80d1
Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-linux-debug-ia32-try,vm-ffi-android-debug-arm64-try,vm-ffi-android-debug-arm-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/171884
Reviewed-by: Liam Appelbe <78c2029e58e395825ba7228e218c841bb436a9e9@google.com>
Commit-Queue: Daco Harkes <930cbae0ca77f1954c53e32620d89cfcca318f00@google.com>

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