Refactoring of prepdocs for easier integration with user upload feature (#1407)

* Changes to prepare for upload

* All pass except multilang

* Made mypy happy

* Fix the arguments

* Unit tests for code changes

* 3.9 compatibility

* Remove unused args from prepdocs

* Address feedback

* Ignore typing error after reporting to SDK team

Author: pamelafox

scripts/prepdocs.ps1

@@ -30,17 +30,11 @@ if ($env:AZURE_SEARCH_ANALYZER_NAME) {
 if ($env:AZURE_VISION_ENDPOINT) {
   $visionEndpointArg = "--visionendpoint $env:AZURE_VISION_ENDPOINT"
 }
-if ($env:AZURE_VISION_KEY) {
-  $visionKeyArg = "--visionkey $env:AZURE_VISION_KEY"
-}
 
-# If vision keys are stored in keyvault provide the keyvault name and secret name
+# If any keys are stored in keyvault provide the keyvault name and secret name
 if ($env:AZURE_KEY_VAULT_NAME) {
   $keyVaultName = "--keyvaultname $env:AZURE_KEY_VAULT_NAME"
 }
-if ($env:VISION_SECRET_NAME) {
-  $visionSecretNameArg = "--visionsecretname $env:VISION_SECRET_NAME"
-}
 if ($env:AZURE_SEARCH_SECRET_NAME) {
   $searchSecretNameArg = "--searchsecretname $env:AZURE_SEARCH_SECRET_NAME"
 }
@@ -81,7 +75,7 @@ $argumentList = "./scripts/prepdocs.py $dataArg --verbose " + `
 "--openaiservice `"$env:AZURE_OPENAI_SERVICE`" --openaideployment `"$env:AZURE_OPENAI_EMB_DEPLOYMENT`" " + `
 "--openaikey `"$env:OPENAI_API_KEY`" --openaiorg `"$env:OPENAI_ORGANIZATION`" " + `
 "--documentintelligenceservice $env:AZURE_DOCUMENTINTELLIGENCE_SERVICE " + `
-"$searchImagesArg $visionEndpointArg $visionKeyArg $visionSecretNameArg " + `
+"$searchImagesArg $visionEndpointArg " + `
 "$adlsGen2StorageAccountArg $adlsGen2FilesystemArg $adlsGen2FilesystemPathArg  " + `
 "$tenantArg $aclArg " + `
 "$disableVectorsArg $localPdfParserArg $localHtmlParserArg " + `