Add synthtool config for remaining clients (#1126)
Add synthtool config for remaining clients (#1126)

* Add Debugger synth.py

* Copy debugger metadata

* Add Bigtable/Bigtable Admin synth script

* Add BigQueryDataTransfer synth script

* Use public synthtool api for vision

* Add Container synth config

Add Container synth config

* Add Dataproc synth config

* Add Dialogflow synth scripts

* Add Dlp synth script

* Add ErrorReporting synth script

* Add Firestore synth script

* Add Iot synth script

* Add Language synth script

* Add Logging synth script

* Add Monitoring synth script

* Add OsLogin synth script

* Add PubSub synth script

* Add Redis synth script

* Add Spanner synth script

* Add Speech synth scripts

* Add Trace synth script

* Add VideoIntelligence synth script

* Fix comments in synth scripts

* Remove `@experimenal` tags from VideoIntelligence V1 (GA)

* Fix missing documentation in Dlp

* Remove OsLogin synth script - being added separately

* Address PR comments

* Add issue link for Dlp documentation fix

* Copy partial veneers for clients without implemented partial veneers

googleapis/google-cloud-php-vision,googleapis/google-cloud-php-vision