[Windows] SDK file name changed from amd64 -> x64

[shahmishal]

Automation to publish the nightly toolchain failed because the amd64 files were missing. However, it seems that the file names have been changed.

Current:
sdk.windows.arm64.cab
sdk.windows.x64.cab
sdk.windows.x86.cab

Previous:
sdk.windows.arm64.cab
sdk.windows.amd64.cab
sdk.windows.x86.cab

[shahmishal]

@compnerd is this expected change?

[compnerd]

Yes, the name change was part of the refactoring. It made things more uniform for packaging the contents.

[shahmishal]

Latest failure is we are now missing:

sdk.windows.x64.msi couldn't be found
sdk.windows.arm64.msi couldn't be found
sdk.windows.x86.msi couldn't be found

[glessard]

This is a blocker for swiftlang/swift-foundation#1276.

We worked around it by not building our new feature on Windows. Not great.

[jmschonfeld]

This is also blocking swiftlang/swift-foundation#1326