feature: add several new features from latest release

[mhernahapetyan]

Added several new features for external-dns -- https://artifacthub.io/packages/helm/bitnami/external-dns
Checking readyness, liveness, also addes features to select log level and log format, desired cout of replicas of external-dns
also added dry run feature,when it is enabled the dns changes will not be performed

[wallhided]

@mhernahapetyan
How you check your modules during development?
I tried to import your module from your branch with following configuration
module external_dns { source = "github.com/provectus/sak-external-dns?ref=add_several_features_from_latest_release" cluster_name = module.kubernetes.cluster_name argocd = module.argocd.state hostedzones = ["Z04283821FJSE3Y1JZN94"] }

And I received:
│ Error: Invalid function argument │ │ on .terraform/modules/external_dns/main.tf line 202, in locals: │ 202: "value" = tostring(value) │ │ Invalid value for "v" parameter: cannot convert list of string to string.

[wallhided]

Please add description of PR (What you have done and etc)