Use the channel ID instead of the test channel

[JulienPeloton]

Bug fix for release 3.16 (anomaly detection filter)

• grant correct permission (files:write) for the slack bot
• understand failure for telegram when sending files

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.11 🎉

Comparison is base (55fb455) 69.54% compared to head (da41acc) 69.65%.

❗ Current head da41acc differs from pull request most recent head 287c79b. Consider uploading reports for the commit 287c79b to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #155      +/-   ##
==========================================
+ Coverage   69.54%   69.65%   +0.11%     
==========================================
  Files          17       17              
  Lines         614      613       -1     
==========================================
  Hits          427      427              
+ Misses        187      186       -1     

Impacted Files	Coverage Δ
...ilters/filter_anomaly_notification/filter_utils.py	64.77% <ø> (-0.07%)	⬇️
fink_filters/filter_anomaly_notification/filter.py	94.87% <100.00%> (+0.27%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.