Standarize channel names

We decided to standarize the channel naming

Renames necessary:
jira-helpers -> jira-java-helpers
jira-mods -> jira-java-mods
jira-helper-requests -> jira-java-requests
jira-pe-helpers -> jira-bedrock-helpers
pe-mods -> jira-bedrock-mods
jira-pe-helper-reqs -> jira-bedrock-requests
jira-earth -> jira-earth-mods
jira-helper-chatter -> jira-global-chatter
jira-chatter -> jira-global-modchatter

New channels:
jira-global-helpers -> Invite everyone from jira-java-helpers, jira-bedrock-helpers and jira-earth-helpers

Integrations:
Move notifications of staff tickets from jira-java-mods to jira-global-mods

Votes:
Yes(11):@urielsalis, @kumasasa, @violine1101, @miwob, @Ezekiel, @bemoty, @NeunEinser, @neko, @pho, @killerbeenl, @asteraoth
No(1): @pokechu22