RFR: 8293219: Microsoft toolchain selection picks 32-bit tools over 64-bit

Thu Sep 1 16:05:47 UTC 2022

The logic in toolchain_windows.m4 happens to prefer the 32-bit version of the tools. This is incorrect, since we only support building on 64-bit Windows. 

Also, since dropping VS2017, we can remove some old bat files we do no longer have to look for.

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Commit messages:
 - 8293219: Microsoft toolchain selection picks 32-bit tools over 64-bit

Changes: https://git.openjdk.org/jdk/pull/10121/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10121&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293219
  Stats: 7 lines in 1 file changed: 0 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/10121.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10121/head:pull/10121

PR: https://git.openjdk.org/jdk/pull/10121