Wrong entity load inside Context vote_activity_context and on function social_like_tokens()

Problem/Motivation

The Message template create_like_node_or_post ("A person likes a topic, comment or event created by me") does not save the Activities correctly. This is due to some code mistakes when loading the vote parent entity. In fact, the parent Entity that the Vote is attached to will be always null.

Steps to reproduce

- Install a fresh Open Social instance (version 12.4.0).
- Enable module "social_like" (if not enabled)
- Create a new Topic with User A
- As User A create a new public Event on the site
- Create a new User B
- As User B go to the fresh node (Event) created by User A
- This should create a new Activity due to the message template "create_like_node_or_post"

Proposed resolution

Fix code with a patch.

Remaining tasks

- Is this a duplicate of another issue?
- We should check if we need to fix this in more places.