ORIGINAL SUMMARY: Investigate changes in
SERVER-76698: Disable Curl Connection Pooling for STS requests
Disables the HTTP connection pooling for making requests to AWS STS by default. It can be re-enabled by setting a boolean setParameter awsSTSUseConnectionPool=trues.
Note: Docs - AWS IAM support in server is not publicly documented so this ticket may be not require any docs work.
Disable Curl Connection pooling since it is appears to be a source of errors in several customer issues. Connections are made from mongod/mongos, go idle, are likely cut by the result side (impossible to know without network captures) and then auth fails.
By disabling connection pooling, we reduce the complexity in this coe.