Rewrite inline comprehensions as functions

[pederhan]

There are numerous places in the code where we use some sort of comprehension, be it dict, set, or list. This is fine from a performance standpoint, but not ideal from a code readability standpoint.

zabbix-auto-config/zabbix_auto_config/processing.py

Lines 1287 to 1303 in c351bcf

	zabbix_managed_hosts: list[Host] = []
	zabbix_manual_hosts: list[Host] = []
	for host in zabbix_hosts.values():
	if self.stop_event.is_set():
	logger.debug("Told to stop. Breaking")
	break
	hostgroup_names = [group.name for group in host.groups]
	if self.zabbix_config.hostgroup_manual in hostgroup_names:
	zabbix_manual_hosts.append(host)
	else:
	zabbix_managed_hosts.append(host)
	db_hostnames = set(db_hosts)
	zabbix_hostnames = set(zabbix_hosts)
	zabbix_managed_hostnames = {host.host for host in zabbix_managed_hosts}
	zabbix_manual_hostnames = {host.host for host in zabbix_manual_hosts}

zabbix-auto-config/zabbix_auto_config/processing.py

Lines 1399 to 1402 in c351bcf

	# Create dict of main interfaces only
	zabbix_interfaces = {
	i.type: i for i in zabbix_host.interfaces if i.main == 1
	}

zabbix-auto-config/zabbix_auto_config/processing.py

Lines 1282 to 1283 in c351bcf

	zproxies = self.api.get_proxies()
	zabbix_proxies = {proxy.name: proxy for proxy in zproxies}

zabbix-auto-config/zabbix_auto_config/processing.py

Lines 1361 to 1364 in c351bcf

	zabbix_proxy = [
	proxy
	for proxy in zabbix_proxies.values()
	if proxy.proxyid == zabbix_proxy_id

It is not always well documented what these comprehension results are used for, and in certain cases we could benefit from refactoring these as functions. Maybe I am being too picky. Who knows.