Cleaning up blue archive npc character tags

BUR #62964 has been approved by @evazion.

nuke general_student_council_member_(blue_archive)
deprecate general_student_council_member_(blue_archive)
deprecate millennium_science_school_student_(blue_archive)
deprecate tea_party_militant_(blue_archive)
deprecate shanhaijing_secondary_school_student_(blue_archive)

• General Student Council Member (Blue Archive) to be replaced with General Student Council Member A (Blue Archive) and General Student Council Member B (Blue Archive). I've already applied these tags to all posts under the original tag.
• Tea Party Militant (Blue Archive) to be replaced with Tea Party Militant A (Blue Archive) and Tea Party Militant B (Blue Archive).
• Shanhaijing Secondary School Student (Blue Archive) to be replaced with Shanhaijing Secondary School Student A (Blue Archive) and Shanhaijing Secondary School Student B (Blue Archive). I've already applied these tags to all member level access posts under the original tag.
• millennium_science_school_student_(blue_archive) is not deprecated when it should be.

The bulk update request #62964 (forum #455771) has been approved by @evazion.

BUR #63071 has been approved by @evazion.

nuke shanhaijing_secondary_school_student_(blue_archive)

I've applied the variant tags to the rest of the posts under this tag.

BUR #63072 has been approved by @evazion.

rename tea_party_militant_(blue_archive)_(cosplay) -> tea_party_militant_outfit_(blue_archive)

So that it functions similar to millennium cheerleader outfit (blue archive) as it's ambiguous as to which one they would be cosplaying.

The bulk update request #63071 (forum #456165) has been approved by @evazion.

The bulk update request #63072 (forum #456166) has been approved by @evazion.