Allow disabling name hashes on the chart level

[iliapolo]

Currently the hash of the construct path is always suffixed to the autogenerated resource name. We should add an option on the chart to opt-out of this.

For example, the following code:

import { App, Chart } from 'cdk8s';
import * as kplus from 'cdk8s-plus-25';

const app = new App();
const chart = new MyChart(app, 'my-chart');

new kplus.Deployment(chart, 'Deployment', {
  containers: [{ image: 'nginx' }]
});

app.synth();

Will generate a Deployment resource with the following name: my-chart-deployment-c8c354dd.

See https://docs.aws.amazon.com/cdk/v2/guide/identifiers.html#identifiers_unique_ids for reasoning why we add the hash.

In some cases the hash is undesirable and currently users are forced to override the Chart.generateObjectName method to drop the hashes. Lets make this easier by adding a chart property that allows dropping the hashes.

See cdk8s-team/cdk8s#232

[sumupitchayan]

Created a PR - can close this issue once it's reviewed and merged!

[sumupitchayan]

Looks like this issue overlaps with this one cdk8s-team/cdk8s#232