feat: Add gold members on pages foundation and community

[antoinehashbang]

About this issue: #2302

• Add a templatetag "gold_corporate_members", similar to the one used in the /download/ page
• In files "base_community.html" and "base_foundation.html", add a block "content-related-extra" in block "content-related"
• In files "foundation.html" and "index.html" (template for community page), use this block to call templatetag "gold_corporate_members"
• Add few tests for this new templatetags
• update test "test_community_index_number_of_queries" because we have increase the number of queries on this page

[sarahboyce]

Thank you for the PR! This looks great 👍
There's an update on the issue that we should have Gold+ sponsors (#2302 (comment)), do you mind updating?

[SaptakS]

@antoinehashbang did you get a chance to make the updates as mentioned in the comment above?

[antoinehashbang]

@antoinehashbang did you get a chance to make the updates as mentioned in the comment above?

Hello, not yet, but It should be done until end of week

[sarahboyce]

Thank you for the updates!
In case @cholmes5 wants to take a look this would roughly look like (ignore the random test data...)

and

@antoinehashbang I think you've missed the following comment about the News page (#2302 (comment))

Also @cholmes5 when you say About pages, do you mean only https://www.djangoproject.com/foundation/ or also other pages like https://www.djangoproject.com/foundation/faq/ ?

[sarahboyce]

Instead of adding a new template and new tag I think we could make the existing tag more generic like

@register.inclusion_tag("fundraising/includes/top_corporate_members.html")
def top_corporate_members(*levels, header=None):
    """
    Usage: {% top_corporate_members "diamond" "platinum" header="Diamond and Platinum Members" %}
    """

    all_members = CorporateMember.objects.by_membership_level()

    members = []
    for level in levels:
        if level in all_members:
            members += all_members[level]

    return {"header": header, "members": members}

and render the header in the template like <h3>{{ header }}</h3>