Add Resource Limits to Scans

[J12934]

Closes #36

This PR adds default limits and requests for the lurcher, parser and hooks.
These are currently static and cannot be changed without rebuilding the operator.

If this turns out to be ineffective this can be changed later.
Either by:

1. Allowing to change the default at install time via the Operators helm chart
2. Allow to override the default limits for parser and hooks in the their CRDs

The resources for the containers in which the actual scans are executed can be configured via helm.
The Charts don't provide a default value as recommended by helm (see note below):

We usually recommend not to specify default resources and to leave this as a conscious choice for the user. This also increases chances charts run on environments with little resources, such as Minikube.