[mirror] Pull Module LTS channel if it exists

[riptide-01]

Description

Added LTS release channel support for modules.

Tests

How to test:

# setup environment
docker run -d -p 5001:5000 --restart always --name registry-installer registry:3
d8 mirror pull --source='registry.deckhouse.io/deckhouse/ee' -l "$TOKEN" -i stronghold@^1.17.6 --deckhouse-tag v1.76.0 --no-platform --no-installer --skip-vex-images --no-security-db ./out/test
d8 mirror push ./out/test localhost:5001/deckhouse

# create lts channel
crane copy localhost:5001/deckhouse/modules/stronghold/release:rock-solid localhost:5001/deckhouse/modules/stronghold/release:lts       

d8 mirror pull --source='localhost:5001/deckhouse' -i stronghold@^1.17.6 --deckhouse-tag v1.76.0 --no-platform --no-installer --skip-vex-images --no-security-db ./out/test2

Before:
no lts channel

May 19 17:44:13.269 INFO  ╔ Pull Modules
May 19 17:44:13.269 INFO  ║ [1/1] Processing module: stronghold
May 19 17:44:13.269 INFO  ║ Beginning to pull stronghold release channels
May 19 17:44:13.269 INFO  ║ Pull stronghold release channels meta
May 19 17:44:13.280 INFO  ║ All required stronghold release channels meta are pulled!
May 19 17:44:13.280 INFO  ║ [1 / 5] Pulling localhost:5001/deckhouse/modules/stronghold/release:rock-solid 
May 19 17:44:13.289 INFO  ║ [2 / 5] Pulling localhost:5001/deckhouse/modules/stronghold/release:alpha 
May 19 17:44:13.297 INFO  ║ [3 / 5] Pulling localhost:5001/deckhouse/modules/stronghold/release:beta 
May 19 17:44:13.304 INFO  ║ [4 / 5] Pulling localhost:5001/deckhouse/modules/stronghold/release:early-access 
May 19 17:44:13.310 INFO  ║ [5 / 5] Pulling localhost:5001/deckhouse/modules/stronghold/release:stable 
May 19 17:44:13.315 INFO  ║ All required stronghold release channels are pulled! 

After:
lts channel pulled

May 19 17:47:31.868 INFO  ╔ Pull Modules
May 19 17:47:31.868 INFO  ║ [1/1] Processing module: stronghold
May 19 17:47:31.872 INFO  ║ Beginning to pull stronghold release channels
May 19 17:47:31.872 INFO  ║ Pull stronghold release channels meta
May 19 17:47:31.893 INFO  ║ All required stronghold release channels meta are pulled!
May 19 17:47:31.893 INFO  ║ [1 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:rock-solid 
May 19 17:47:31.905 INFO  ║ [2 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:lts 
May 19 17:47:31.913 INFO  ║ [3 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:alpha 
May 19 17:47:31.920 INFO  ║ [4 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:beta 
May 19 17:47:31.926 INFO  ║ [5 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:early-access 
May 19 17:47:31.933 INFO  ║ [6 / 6] Pulling localhost:5001/deckhouse/modules/stronghold/release:stable 
May 19 17:47:31.940 INFO  ║ All required stronghold release channels are pulled!