feat(build): Cancellable Build and global timeout

[astefanutti]

Currently, build timeout is governed by two configuration settings from the IntegrationPlatform, one global, and another specific to Maven commands. This can be confusing for the end-users, when and how these two settings apply. Besides Builds are not really cancellable.

This PR aims at unifying timeout setting for all the build operations (container images, OpenAPI, Camel Catalogs), and at making sure operations are cancelled as soon as their contexts time out.

TODO:

• Cancelling Build routine context
• Sending SIGTERM signal to Build Pod containers
• Listening to SIGTERM / SIGINT signals from builder command
• Writing container termination message
• Cancelling S2i build completion wait
• Cancelling Maven process context (done in chore(build): Cancellable Maven operations #2348)
• Signalling termination to running S2i build pod (done in chore(build): Cancel s2i Build on context cancellation or timeout #2398)

Release Note

feat(build): Global build timeout

[astefanutti]

Let's merge this and complete the remaining items (mainly Maven processes cancellation) in a subsequent PR.