Uncrispyfy all edit- and add-forms in `/sedddb`

[podliashanyk]

While working on #2994 I noticed that there are many add- and edit-forms in /seeddb that use crispy-forms. Some use crispy-forms explicitly (and thus are already mentioned in #2794), some implicitly. Some use basic fields and are therefore universally convertible by using seeddb/_form_fields.html from #2994, some use "special" fields and need additional tweaks.

Add/edit forms in seeddb by URL:

NB! No differentiation between "add" and "edit" is needed here since both form types stem from the same template - seeddb/edit.html, unless otherwise specified below.

• [x] /seeddb/netboxgroup/ (#2988)
• [x] #2997
• [x] #3102 (/seeddb/service/add/ and /seeddb/service/edit/)
• [x] #3104
• [x] /seeddb/room/ (#3000)
• [x] /seeddb/location/ (#3000)
• [x] /seeddb/organization/ (#3000)
• [x] /seeddb/usage/ (#3000)
• [x] /seeddb/type/ (#3000)
• [x] /seeddb/vendor/add (edit not possible) (#3000)
• [x] #3118
• [x] /seeddb/cabling/ (#3000)
• [ ] Merge/cleanup seeddb form templates