cli: migrate upload and release to new channel-map

[sergiusens]

Signed-off-by: Sergio Schvezov sergio.schvezov@canonical.com

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[sergiusens]

https://bugs.launchpad.net/snapcraft/+bug/1816861

[cjp256]

LGTM

[codecov-commenter]

Codecov Report

Merging #3145 into master will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3145      +/-   ##
==========================================
- Coverage   87.53%   87.47%   -0.06%     
==========================================
  Files         253      253              
  Lines       17758    17761       +3     
  Branches     2738     2738              
==========================================
- Hits        15544    15537       -7     
- Misses       1581     1592      +11     
+ Partials      633      632       -1     

Impacted Files	Coverage Δ
snapcraft/_store.py	83.68% <100.00%> (-2.16%)	⬇️
snapcraft/cli/store.py	86.69% <100.00%> (+0.29%)	⬆️

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