Moves grpcConcurrency config from client.toml to config.toml.
Brief Changelog
Removed grpcConcurreny flag (do we think this is the right move? I felt like grpcConcurrency should just be something set at the config level, not something that should be defined at the query level. If not, I can change this back. Side note, the flag was never really implemented correctly in the first place)
Removed grpcConcurrency from client.toml
Created new test case for grpcConcurrency
Added grpcConcurrency to config.toml
Testing and Verifying
This change is already covered by existing tests
Documentation and Release Note
Does this pull request introduce a new feature or user-facing behavior changes? no
Is a relevant changelog entry added to the Unreleased section in CHANGELOG.md? no
How is the feature or change documented? not applicable
What is the purpose of the change
Moves grpcConcurrency config from client.toml to config.toml.
Brief Changelog
Testing and Verifying
This change is already covered by existing tests
Documentation and Release Note
Unreleased
section inCHANGELOG.md
? no