* Mw/lambda envoy extension parse region (#4107)
* updated builtin extension to parse region directly from ARN
- added a unit test
- added some comments/light refactoring
* updated golden files with proper ARNs
- ARNs need to be right format now that they are being processed
* updated tests and integration tests
- removed 'region' from all EnvoyExtension arguments
- added properly formatted ARN which includes the same region found in the removed "Region" field: 'us-east-1'
* regenerated proto files
* mogify needed pbcommon structs
* mogify needed pbconnect structs
* fix compilation errors and make config_translate_test pass
* add missing file
* remove redundant oss func declaration
* fix EnterpriseMeta to copy the right data for enterprise
* rename pbcommon package to pbcommongogo
* regenerate proto and mog files
* add missing mog files
* add pbcommon package
* pbcommon no mog
* fix enterprise meta code generation
* fix enterprise meta code generation (pbcommongogo)
* fix mog generation for gogo
* use `protoc-go-inject-tag` to inject tags
* rename proto package
* pbcommon no mog
* use `protoc-go-inject-tag` to inject tags
* add non gogo proto to make file
* fix proto get
Michael Wilkerson