fix: router transformer client fails with error connect: cannot assign requested address

[atzoum]

Description

Problem caused by exhausted sockets on the container, due to having too many connections in TIME_WAIT state.
Related to golang/go#16012

• Using common http transport setting for both processor and router transformer clients
• Change IdleConnTimeout: 30 * time.Second
• Change default MaxIdleConnsPerHost: 10

Linear Ticket

PIPE-330

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.