Use & to run powershell script, and -DisableCurl in the default windows installation

[dfordivam]

Fixes #1000

[hasufell]

We have a bootstrap test boostrap.yaml. It currently just runs the local script. I guess we could:

• inspect commit/branch and then actually use the full url to the bootstrap-haskell.ps1 at that commit to fetch it and install it via the new command

[hasufell]

Did you ensure that the error behavior is the same?

[dfordivam]

We have a bootstrap test boostrap.yaml. It currently just runs the local script. I guess we could:

* inspect commit/branch and then actually use the full url to the `bootstrap-haskell.ps1` at that commit to fetch it and install it via the new command

Done. It worked fine.

Run $ErrorActionPreference = [System.Management.Automation.ActionPreference]::Stop
$ErrorActionPreference = [System.Management.Automation.ActionPreference]::Stop
$curDir = Get-Location
Write-Host "Current Working Directory: $curDir"
Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; try { & ([ScriptBlock]::Create((Invoke-WebRequest https://raw.githubusercontent.com/haskell/ghcup-hs/c7946174d65af8d1afffcec72adc51d2228c91ad/scripts/bootstrap/bootstrap-haskell.ps1 -UseBasicParsing))) -InstallDir ${GITHUB_WORKSPACE} -BootstrapUrl ("{0}/scripts/bootstrap/bootstrap-haskell" -f $curDir) -InBash -Msys2Env "MINGW64" } catch { Write-Error $_ }