[FBZ-10505] Switch puma to phased-restart for hot restart

[rupikakapoor]

Description of your patch

Fix puma restart on deploy cause downtime

Recommended Release Notes

Fixed issue where puma restart on deploy cause downtime

Estimated risk

High

Components involved

All clients who use Puma as application stack

Dependencies

ey-puma

Description of testing done

Create v7 environment with puma
Boot Environment.
Run application deployment and monitor for application uptime while Application deployment at Restarting app servers step.

• Check for if there is any downtime.
• note how long it took to finish.
• how many workers of puma was running.

QA Instructions

Create v7 environment with puma
Boot Environment.
Run application deployment and monitor for application uptime while Application deployment at Restarting app servers step.

• Check for if there is any downtime.
• note how long it took to finish.
• how many workers of puma was running.
• We need to test for an application with gemfile updates if deploy able to load that. (working with plantoeat to test that)

[paulasaurus]

On line 46 please update "hot deploy" to "phased-restart deploy".

Then we also need to confirm what impact the extended amount of time required by a phased-restart has on the deploy process, in terms of it waiting for the restart to complete or not.