Upgrade to go 1.23 #178

Is your enhancement related to a problem? Please describe.

Upgrade the project to use go 1.23. The project currently uses go 1.20:

Describe the solution you'd like

The following repos should update to go 1.23:

• https://github.com/redhat-developer/web-terminal-operator
• https://github.com/redhat-developer/web-terminal-exec

Describe alternatives you've considered

Additional context

Upgrading go will help us upgrade x/net library since version < 0.33.0 contains a CVE: GHSA-w32m-9786-jp63

Related PR: #177.