Provide a generic to http delete method

[alallema]

Pull Request

What does this PR do?

Most of the methods had to use the jsonHandler after the call to the delete method through the client. The purpose of this PR is to bypass this step to simplify the call to the delete method via the client:

    public Task resetRankingRulesSettings(String uid) throws MeilisearchException {
        Task task = jsonHandler.decode(this.indexesHandler.delete(uid), Task.class);
        return task;
    }

became

    public Task resetRankingRulesSettings(String uid) throws MeilisearchException {
        String urlPath = "/indexes/" + uid + "/settings/ranking-rules";
        return httpClient.delete(urlPath, Task.class);
    }

[brunoocasali]

I'll let you fix the CI before review CC: @alallema

[alallema]

I'll let you fix the CI before review CC: @alallema

@brunoocasali
Done, there was an extra curly brace ...