Add sponsoredCount prop

[hiagolcm]

What problem is this solving?

Currently, the maximum number of sponsoredProducts is hardcoded. This PR allows the developer to change it via store-theme. For example:

"store.search": {
    "blocks": ["search-result-layout"],
    "props": {
      "context": {
        "sponsoredCount": 4
      }
    }
  },

It also removes the sponsoredProductsBehavior which is a deprecated prop.

How to test it?

Workspace

Related to / Depends on

vtex-apps/store#593

[vtex-io-ci-cd]

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• Patch (backwards-compatible bug fixes)

• Minor (backwards-compatible functionality)

• Major (incompatible API changes)

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[vtex-io-docs-bot]

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