move cratesio definition to env var

Author: Steve Lee (POWERSHELL HE/HIM) (from Dev Box)

.cargo/config.toml

@@ -4,7 +4,6 @@ registry-auth = true
 
 [registries]
 powershell = { index = "sparse+https://pkgs.dev.azure.com/powershell/PowerShell/_packaging/powershell/Cargo/index/" }
-cratesio = { index = "sparse+https://index.crates.io/"}
 
 [registry]
 global-credential-providers = ["cargo:token"]

build.ps1

@@ -175,10 +175,12 @@ if (!$SkipBuild) {
     if (!$UseCFS) {
         # this will override the config.toml
         Write-Host "Setting CARGO_SOURCE_crates-io_REPLACE_WITH to 'crates-io'"
-        ${env:CARGO_SOURCE_crates-io_REPLACE_WITH} = 'cratesio'
+        ${env:CARGO_SOURCE_crates-io_REPLACE_WITH} = 'CRATESIO'
+        $env:CARGO_REGISTRIES_CRATESIO_INDEX = 'sparse+https://index.crates.io/'
     } else {
         Write-Host "Using CFS for cargo source replacement"
         ${env:CARGO_SOURCE_crates-io_REPLACE_WITH} = $null
+        $env:CARGO_REGISTRIES_CRATESIO_INDEX = $null
     }
 
     # make sure dependencies are built first so clippy runs correctly