Release & test v0.15 snapshot packages

[dcroote]

No description provided.

[dcroote]

Ran into the following terraform error (Error: Command failed: terraform apply -var="aws_region=... when testing an AWS deployment

Error: expected runtime to be one of [nodejs nodejs4.3 nodejs6.10 nodejs8.10 nodejs10.x nodejs12.x nodejs14.x nodejs16.x java8 java8.al2 java11 python2.7 python3.6 python3.7 python3.8 python3.9 dotnetcore1.0 dotnetcore2.0 dotnetcore2.1 dotnetcore3.1 dotnet6 nodejs4.3-edge go1.x ruby2.5 ruby2.7 provided provided.al2 nodejs18.x python3.10 java17], got nodejs20.x

with module.httpReq.aws_lambda_function.lambda,

Which, after some research, makes sense since our version is

airnode/packages/airnode-deployer/terraform/aws/providers.tf

Line 5 in 4a8b877

version = "~> 4.67"

and nodejs20.x support was added by terraform in v5.26.0.

Therefore, #1780 will need to be tested & merged

[dcroote]

Upgraded terraform-provider-aws in #1780 and terraform-provider-google in #2008. I tested each in the process so should be good to go now

[dcroote]

Tested using yarn test:release against snapshot snapshot-v0.15.0-rc.1 and it worked