Terraform

ENHANCEMENTS:

• config: add GCS source support for modules (#21254)
• command/format: Reduce extra whitespaces & new lines (#21334)
• backend/s3: Support for chaining assume IAM role from AWS shared configuration files (#21815)

BUG FIXES:

• configs: Can now use references like tags["foo"] in ignore_changes to ignore in-place updates to specific keys in a map (#21788)
• configs: Fix panic on missing value for version attribute in provider blocks. (#21825)
• lang/funcs: Fix merge panic on null values. Now will give an error if null used (#21695)
• backend/remote: Fix "Conflict" error if the first state snapshot written after a Terraform CLI upgrade has the same content as the prior state. (#21811)
• backend/s3: Fix AWS shared configuration file credential source not assuming a role with environment and ECS credentials (#21815)