Nightly installers - avoid hanging if there's no valid run found

[anthony-c-martin]

The GH CLI appears to hang if a runId isn't provided - this PR just adds an explicit check for it

[github-actions]

Test this change out locally with the following install scripts (Action run 17224291347)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 17224291347

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 17224291347"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 17224291347

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 17224291347"

[github-actions]

Dotnet Test Results

   15 files   -    120     15 suites   - 120   3m 55s ⏱️ - 58m 32s
6 729 tests  -  5 556  6 729 ✅  -  5 556  0 💤 ±0  0 ❌ ±0 
8 843 runs   - 33 604  8 843 ✅  - 33 604  0 💤 ±0  0 ❌ ±0 

Results for commit 2a8a5a0. ± Comparison against base commit 034413c.

This pull request removes 7254 and adds 456 tests. Note that renamed tests count towards both.

		nestedProp1: 1
		nestedProp2: 2
		prop1: true
		prop2: false
	1
	2
	\$'")
	prop1: true
	prop2: false
…

Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidCurrentCloudProfile_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "currentProfile": "MyCloud"
  }
}","The cloud profile "MyCloud" does not exist. Available profiles include "AzureChinaCloud", "AzureCloud", "AzureUSGovernment".")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidCurrentCloudProfile_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "currentProfile": "MyCloud",
    "profiles": {
      "MyCloud": {
        "resourceManagerEndpoint": "Not and URL"
      }
    }
  }
}","The cloud profile "MyCloud" is invalid. The value of the "resourceManagerEndpoint" property "Not and URL" is not a valid URL.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidCurrentCloudProfile_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "currentProfile": "MyCloud",
    "profiles": {
      "MyCloud": {
        "resourceManagerEndpoint": "https://example.invalid"
      }
    }
  }
}","The cloud profile "MyCloud" is invalid. The "activeDirectoryAuthority" property cannot be null or undefined.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidCurrentCloudProfile_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "currentProfile": "MyCloud",
    "profiles": {
      "MyCloud": {
        "resourceManagerEndpoint": "https://example.invalid",
        "activeDirectoryAuthority": "Not an URL"
      }
    }
  }
}","The cloud profile "MyCloud" is invalid. The value of the "activeDirectoryAuthority" property "Not an URL" is not a valid URL.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidCurrentCloudProfile_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "currentProfile": "MyCloud",
    "profiles": {
      "MyCloud": {
      }
    }
  }
}","The cloud profile "MyCloud" is invalid. The "resourceManagerEndpoint" property cannot be null or undefined.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidUserAssignedIdentityOptions_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "credentialOptions": {
        "managedIdentity": {
            "type": "UserAssigned"
        }
    }
  }
}","The managed-identity configuration is invalid. Either "clientId" or "resourceId" must be set for user-assigned identity.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidUserAssignedIdentityOptions_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "credentialOptions": {
        "managedIdentity": {
            "type": "UserAssigned",
            "clientId": "foo"
        }
    }
  }
}","The managed-identity configuration is invalid. "clientId" must be a GUID.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidUserAssignedIdentityOptions_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "credentialOptions": {
        "managedIdentity": {
            "type": "UserAssigned",
            "clientId": "foo",
            "resourceId": "bar"
        }
    }
  }
}","The managed-identity configuration is invalid. "clientId" and "resourceId" cannot be set at the same time for user-assigned identity.")
Bicep.Core.UnitTests.Configuration.ConfigurationManagerTests ‑ GetConfiguration_InvalidUserAssignedIdentityOptions_PropagatesConfigurationDiagnostic ("{
  "cloud": {
    "credentialOptions": {
        "managedIdentity": {
            "type": "UserAssigned",
            "resourceId": "bar"
        }
    }
  }
}","The managed-identity configuration is invalid. "resourceId" must be a valid Azure resource identifier.")
Bicep.Core.UnitTests.Diagnostics.DiagnosticBuilderTests ‑ MissingTypePropertiesHasFix ("
                 resource appService 'Microsoft.Web/serverFarms@2020-06-01' = {
                       sku: {

                         name: 'D1'

                       }
                       // comment
                 }","
                 resource appService 'Microsoft.Web/serverFarms@2020-06-01' = {
                       sku: {

                         name: 'D1'

                       }
                       
                       location:
                       name:// comment
                 }")
…

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