Provide global.affinity and global.tolerations options to apply for all kubevious components

[vumdao]

It will be convenient to have global.affinity and global.tolerations option so that we don't have to define them at each component
example:

    global: {
      affinity: {
        nodeAffinity: {
          requiredDuringSchedulingIgnoredDuringExecution: {
            nodeSelectorTerms: [{
              matchExpressions: [{
                key: 'deployment',
                operator: 'In',
                values: ['my-affinity'],
              }],
            }],
          },
        },
      },
      tolerations: [{
        effect: 'NoSchedule',
        key: 'dedicated',
        operator: 'Equal',
        value: 'my-toleration',
      }],
    },