Add RPM pinentry

[david-goudet]

Description of problem:

User is creating a GPG key to commit in his repo. When he try to create a GPG key the "error: error No pinentry" error is reported.

To solve this issue:

Adding RPM pinentry in file devspaces/context/setup.sh.

Context is presented here: https://issues.redhat.com/browse/CRW-7895

Thank you for your help!

---

Steps to Reproduce

1. Launch the workspace: Ansible
   then run ;
   gpg --gen-key

2. After entering your name and e-mail you will have the error:
   gpg: agent_genkey failed: No pinentry
   Key generation failed: No pinentry
   Actual results:

gpg creation results in following error:

gpg: key D79: error sending to agent: No pinentry

gpg: error building skey array: No pinentry

gpg: error reading 'myprivatekeys.asc': No pinentry

gpg: import from 'myprivatekeys.asc' failed: No pinentry
Expected results:

GPG key creation should proceed

[alisonlhart]

@david-goudet Thank you for this contribution! Approved.