RFR: 8254072: AArch64: Get rid of --disable-warnings-as-errors on Windows+ARM64 build [v2]

[Bernhard Urban-Forster]

> I organized this PR so that each commit contains the warning emitted by MSVC as commit message and its relevant fix.
> 
> Verified on
> * Linux+ARM64: `{hotspot,jdk,langtools}:tier1`, no failures.
> * Windows+ARM64: `{hotspot,jdk,langtools}:tier1`, no (new) failures.
> * internal macOS+ARM64 port: build without `--disable-warnings-as-errors` still works. Just mentioning this here, because
>   it's yet another toolchain (Xcode / clang) that needs to be kept happy [going
>   forward](https://openjdk.java.net/jeps/391).

Bernhard Urban-Forster has updated the pull request with a new target base due to a merge or a rebase. The pull request
now contains 18 commits:

 - Merge remote-tracking branch 'upstream/master' into 8254072-fix-windows-arm64-warnings
 - ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1441): warning C4267: 'argument': conversion from 'size_t' to
   'int', possible loss of data
   ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1446): warning C4267: 'argument': conversion from 'size_t' to
   'int', possible loss of data ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1654): warning C4267: 'argument':
   conversion from 'size_t' to 'int', possible loss of data
 - Revert changes for "warning C4146: unary minus operator applied to unsigned type, result still unsigned"
 - msvc: disable unary minus warning for unsigned types
 - ./src/hotspot/cpu/aarch64/templateInterpreterGenerator_aarch64.cpp(1123): warning C4267: 'initializing': conversion
   from 'size_t' to 'int', possible loss of data
   ./src/hotspot/cpu/aarch64/templateInterpreterGenerator_aarch64.cpp(1123): warning C4267: 'initializing': conversion
   from 'size_t' to 'const int', possible loss of data
 - ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1312): warning C4267: 'argument': conversion from 'size_t' to
   'unsigned int', possible loss of data
   ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1370): warning C4267: 'argument': conversion from 'size_t' to
   'int', possible loss of data ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1441): warning C4146: unary minus
   operator applied to unsigned type, result still unsigned ./src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp(1441):
   warning C4267: 'argument': conversion from 'size_t' to 'int', possible loss of data
 - ./src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp(2472): warning C4312: 'type cast': conversion from 'unsigned int'
   to 'address' of greater size
 - ./src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp(1527): warning C4267: 'argument': conversion from 'size_t' to
   'int', possible loss of data
 - ./src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp(2901): warning C4267: 'initializing': conversion from 'size_t' to
   'int', possible loss of data
   ./src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp(2901): warning C4267: 'initializing': conversion from 'size_t' to
   'const int', possible loss of data
 - ./src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp(2756): warning C4146: unary minus operator applied to unsigned
   type, result still unsigned
 - ... and 8 more: https://git.openjdk.java.net/jdk/compare/5351ba6c...a081dfb4

-------------

Changes: https://git.openjdk.java.net/jdk/pull/530/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=530&range=01
  Stats: 22 lines in 8 files changed: 2 ins; 0 del; 20 mod
  Patch: https://git.openjdk.java.net/jdk/pull/530.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/530/head:pull/530

PR: https://git.openjdk.java.net/jdk/pull/530