Changing default behavior to no providers instead of all-providers

[LiorLieberman]

What would you like to be added:
Default behavior needs to change to not include any provider by default

Why this is needed:
Including all provider by default causes us many problems. Two example are #127 and #138.

Also, most people would only have have one provider, and in case of more providers installed, they can run the tool multiple times.

/help
/triage accepted

[k8s-ci-robot]

@LiorLieberman:
This request has been marked as needing help from a contributor.

Guidelines

Please ensure that the issue body includes answers to the following questions:

• Why are we solving this issue?
• To address this issue, are there any code changes? If there are code changes, what needs to be done in the code and what places can the assignee treat as reference points?
• Does this issue have zero to low barrier of entry?
• How can the assignee reach out to you for help?

For more details on the requirements of such an issue, please see here and ensure that they are met.

If this request no longer meets these requirements, the label can be removed
by commenting with the /remove-help command.

In response to this:

What would you like to be added:
Default behavior needs to change to not include any provider by default

Why this is needed:
Including all provider by default causes us many problems. Two example are #127 and #138.

Also, most people would only have have one provider, and in case of more providers installed, they can run the tool multiple times.

/help
/triage accepted

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[LiorLieberman]

cc: @levikobi @mlavacca

[mlavacca]

An additional problem of running all providers by default is that with the addition of the openapi provider, now if no provider is passed as argument, the tool tries to use all the regular providers plus openapi, which does not really make much sense. I think we should set the providers flag to be mandatory instead of defaulting to all providers.