As in CODETOOLS-7903400, the environment variables that are passed to the tests could be updated.

The "ProgramFiles(x86)" environment variable is not currently passed to tests, since it's not included in the DEFAULT_WINDOWS_ENV_VARS array ([1]).

This is problematic for tests that use this variable for locating different tools in Windows. This happened, for instance, in the JDK11 AOT Compiler tests that use the variable to locate the Microsoft Linker (see [2]).

In these cases it would be useful that the "ProgramFiles(x86)" environment variable is included in the DEFAULT_WINDOWS_ENV_VARS array.

Some other environment variables that may also be worth whitelisting could be:

- PROCESSOR_ARCHITECTURE
- ProgramFiles
- ProgramW6432
- CommonProgramFiles
- CommonProgramW6432

(as stated in [3]).

[1]
https://github.com/openjdk/jtreg/blob/a02f8b1087097917186ca0d952385324371eb7f1/src/share/classes/com/sun/javatest/regtest/tool/Tool.java#L2466

[2]
https://github.com/openjdk/jdk11u-dev/blob/0927ca70e66ef27b38cbf5c0dd2851c796218067/src/jdk.aot/share/classes/jdk.tools.jaotc/src/jdk/tools/jaotc/Linker.java#L208

[3]
https://learn.microsoft.com/en-us/windows/win32/winprog64/wow64-implementation-details