feat: Faster operator startup

[astefanutti]

On typical environments, it can take up to 30s for the operator binary to startup, and being ready to service reconciliation requests. This is mainly caused by the installation of the Kamelets bundled within the operator while it starts.

In order to speed up that installation time and reduce the start time overall, this PR:

• Increases the value of the maximum burst parameter used for client-side request throttling
• Use Server-Side Apply to reduce the number of requests for each Kamelet, from up to 3 (get + create + update) down to a single (patch) one in all cases
• Installs each bundled Kamelet in a separate Goroutine executed in parallel

This results in a startup time as small as 0.5s with the current number of bundled Kamelets (~140 as of writing), and should scale by orders of magnitude better as this number increases.

Incidentally, this should also speed up the reconciliation of IntegrationPlatform that are created, as bundle Kamelets are also installed in that case.

Release Note

feat: Faster operator startup

[nicolaferraro]

This is great!

[tadayosi]

Awesome improvement!

[zregvart]

I could be wrong on this, @astefanutti does this make any sense?