refactor(titus): Adding load balancer incompatibility

[alanmquach]

Removing the need to select a cloud provider when creating a new load balancer when the only providers to be considered are aws and titus since titus delegates to aws anyways.

Probably easiest to review just the last commit (12f6f42) since the first 2 are simply reverts of the current implementation.

Managed to do this without introducing any titus awareness into amazon by allowing incompatible load balancer types to be specified by the provider (in this case titus.module.ts):

    loadBalancer: {
      LoadBalancersTag: AmazonLoadBalancersTag,
      incompatibleLoadBalancerTypes: [
        {
          type: 'classic',
          reason: 'Classic Load Balancers cannot be used with Titus as they do not have IP based target groups.',
        },
      ],
      useProvider: 'aws',
    },

This allows the load balancer selection dialog to generically ask whether choices are compatible.

Also if any choice is not compatible with all providers (isIncompatibleWithAllProviders), it is removed as a choice altogether.

Like this better and it removes the extra click.

Also like this because it could be extended in the future to allow app-types (if that becomes a thing) provide opinions about what load balancers it does not want to be configured with.

Not just because I came up with it.

[spinnakerbot]

The following commits need their title changed:

• 29e93a6: Revert "refactor(amazon): choices prop is actually optional (refactor(amazon): choices prop is actually optional #7379)"

• 2b50334: Revert "fix(titus): Removing NLB as it is not compatible with Titus (fix(titus): Removing NLB as it is not compatible with Titus #7317)"

Please format your commit title into the form:

<type>(<scope>): <subject>, e.g. fix(kubernetes): address NPE in status check

This allows us to easily generate changelogs & determine semantic version numbers when cutting releases. You can read more about commit conventions here.

[spinnakerbot]

The following commits need their title changed:

• 29e93a6: Revert "refactor(amazon): choices prop is actually optional (refactor(amazon): choices prop is actually optional #7379)"

• 2b50334: Revert "fix(titus): Removing NLB as it is not compatible with Titus (fix(titus): Removing NLB as it is not compatible with Titus #7317)"

Please format your commit title into the form:

<type>(<scope>): <subject>, e.g. fix(kubernetes): address NPE in status check

This allows us to easily generate changelogs & determine semantic version numbers when cutting releases. You can read more about commit conventions here.