[qwJFy8pp] Add @Admin to trigger procedures

[vga91]

• Added @Admin annotation to trigger procedures
• Added testTriggersAllowedOnlyWithAdmin

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Please note that this is a breaking change
that we've introduced in order to improve procedures security.

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Better to use @Admin check instead of Util.checkAdmin, like here :

• it will most likely be compatible with future versions
• it doesn't require additional contexts:
• we don't have to specify the procedure name, e.g. Util.checkAdmin(securityContext, callContext,"apoc.trigger.install");

    @Context
    public SecurityContext securityContext;
    @Context
    public ProcedureCallContext callContext;

• similar error, but with more details

// with Admin annotation
Executing admin procedure 'apoc.trigger.remove' permission has not been granted for user 'name' with roles [PUBLIC, editor, publisher] restricted to TOKEN_WRITE.

// with Util.checkAdmin
Failed to invoke procedure `apoc.trigger.add`: Caused by: java.lang.RuntimeException: This procedure apoc.trigger.install is only available to admin users

[nadja-muller]

Looks good. I'm not sure whether we should also add a @Admin annotation to the list procedure.
Also, we should make sure that it is clear:

• This is a breaking change
• We do it for improving security.
  Could you write this in the description of the PR?