RFR: 8265399: Update to Visual Studio 2019 version 16.9.3

[Kevin Rushforth]

This patch updates the compiler to Visual Studio 2019 version 16.9.3 on Windows, in order to match JDK 17 -- see [JDK-8265371](https://bugs.openjdk.java.net/browse/JDK-8265371).

I ran a full build and test, including media and WebKit.

NOTE: I also have PR #481 out for review to update the Linux gcc compiler. I intend to integrate that one first, at which time I will need to merge `master` into this branch to resolve a trivial merge conflict (the changes are on adjacent lines).

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Commit messages:
 - 8265399: Update to Visual Studio 2019 version 16.9.3

Changes: https://git.openjdk.java.net/jfx/pull/482/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=482&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8265399
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/482.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/482/head:pull/482

PR: https://git.openjdk.java.net/jfx/pull/482