(GHA) Update casing and fix authorization (#12253)

Prior to this change, the authorization parameter handling didn't
correctly handle an empty string for the `authorized_accounts`
parameter. The casing for all other workflows used incorrect
casing for workflow parameters, like `Message_Body` instead of
`message_body`.

This change:

- Corrects the casing of all parameter handler entries.
- Ensures that the parameter handler for `authorized_accounts`
  only passes the parameter to the action script when the
  input value is a non-empty string.

Author: michaeltlombardi

.github/actions/commenting/expectations/v1/Parameters.psd1

@@ -1,7 +1,7 @@
 @{
     Parameters = @(
       @{
-        Name = 'Repository'
+        Name = 'repository'
         Type = 'string'
         IfNullOrEmpty = {
           param($ErrorTarget)
@@ -31,7 +31,7 @@
       }
 
       @{
-        Name = 'Message_Body'
+        Name = 'message_body'
         Type = 'String'
         IfNullOrEmpty = {
           param($ErrorTarget)
@@ -75,7 +75,7 @@
       }
 
       @{
-        Name = 'Message_Path'
+        Name = 'message_path'
         Type = 'String'
         IfNullOrEmpty = {
           param($ErrorTarget)

.github/actions/reporting/stale-content/v1/Parameters.psd1

@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Relative_Folder_Path'
+      Name = 'relative_folder_path'
       Type = 'String[]'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -33,7 +33,7 @@
     }
 
     @{
-      Name = 'Exclude_Folder_Segment'
+      Name = 'exclude_folder_segment'
       Type = 'String[]'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -56,7 +56,7 @@
     }
 
     @{
-      Name = 'Days_Until_Stale'
+      Name = 'days_until_stale'
       Type = 'Int'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -91,7 +91,7 @@
     }
 
     @{
-      Name = 'Stale_Since_Date'
+      Name = 'stale_since_date'
       Type = 'DateTime'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -125,7 +125,7 @@
     }
 
     @{
-      Name = 'Upload_Artifact'
+      Name = 'upload_artifact'
       Type = 'Bool'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -166,7 +166,7 @@
     }
 
     @{
-      Name = 'Export_As_Csv'
+      Name = 'export_as_csv'
       Type = 'Bool'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -206,7 +206,7 @@
     }
 
     @{
-      Name = 'Export_Path'
+      Name = 'export_path'
       Type = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)

.github/actions/reporting/versioned-content/v1/Parameters.psd1

@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Repository'
+      Name = 'repository'
       Type = 'String'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -31,7 +31,7 @@
     }
 
     @{
-      Name = 'Number'
+      Name = 'number'
       Type = 'Int'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -61,7 +61,7 @@
     }
 
     @{
-      Name = 'Include_Path_Pattern'
+      Name = 'include_path_pattern'
       Type = 'String[]'
       IfNullOrEmpty = {
         # It's okay if this parameter is not specified.
@@ -84,7 +84,7 @@
       }
     }
     @{
-      Name = 'Exclude_Path_Pattern'
+      Name = 'exclude_path_pattern'
       Type = 'String[]'
       IfNullOrEmpty = {
         # It's okay if this parameter is not specified.

.github/actions/verification/authorization/v1/Parameters.psd1

@@ -40,7 +40,10 @@
       Process = {
         param($Parameters, $Value, $ErrorTarget)
 
-        [string[]]$SpecifiedAccounts = $Value -split ','
+        [string[]]$SpecifiedAccounts = $Value -split ',' | Where-Object {
+           -not [string]::IsNullOrEmpty($_)
+        }
+
         if ($SpecifiedAccounts.Count -gt 0) {
           $Parameters.AuthorizedAccounts = $SpecifiedAccounts
           Write-HostParameter -Name AuthorizedAccounts -Value $Parameters.AuthorizedAccounts

.github/actions/verification/checklist/v1/Parameters.psd1

@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Body'
+      Name = 'body'
       Type = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -30,7 +30,7 @@
     }
 
     @{
-      Name          = 'Reference_Url'
+      Name          = 'reference_url'
       Type          = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)