partial matches in bot instance name should not be allowed when triggering the bot

[bedroge]

In EESSI/software-layer#1389 I noticed that both eessi-bot-mc-aws and eessi-bot-mc-aws-eu-south replied to my bot build command, while I explicitly used instance:eessi-bot-mc-aws. It looks like a partial match of the instance name is allowed (probably here https://github.com/EESSI/eessi-bot-software-layer/blob/develop/tools/filter.py#L300?), we should make that stricter and only allow exact matches of the name.

[boegel]

@bedroge Yeah, I agree.

For now, can we rename eessi-bot-mc-aws-eu-south to avoid partial match?

[Neves-P]

Some of the necessary changes may already be done in #310 but we need to update them to work in the current setup.

The quickest way forward is to change the name of the bot.