transcode: trigger the transcode via remote or local broadcaster

[emranemran]

If the access-token is provided in the transcode request, the remote broadcaster (via livepeer.com) will be used to transcode. Otherwise, the local broadcaster will be used to transcode.

[emranemran]

The transcoded segments are being returned correctly, but still needs a call to upload to s3.

[AlexKordic]

Looks good, LGTM

[codecov]

Codecov Report

Merging #98 (220a8d3) into main (3adef83) will decrease coverage by 6.77570%.
The diff coverage is 8.86525%.

@@                 Coverage Diff                 @@
##                main         #98         +/-   ##
===================================================
- Coverage   46.13527%   39.35957%   -6.77570%     
===================================================
  Files             21          24          +3     
  Lines           1242        1499        +257     
===================================================
+ Hits             573         590         +17     
- Misses           598         833        +235     
- Partials          71          76          +5     

Impacted Files	Coverage Δ
cache/transcoding.go	60.25641% <ø> (ø)
clients/broadcaster.go	0.00000% <0.00000%> (ø)
clients/broadcaster_local.go	0.00000% <0.00000%> (ø)
clients/broadcaster_remote.go	0.00000% <0.00000%> (ø)
clients/mist_client.go	49.14530% <ø> (ø)
transcode/transcode.go	43.58974% <46.51163%> (-1.14710%)	⬇️
handlers/misttriggers/recording_end.go	22.13115% <50.00000%> (+2.13115%)	⬆️
handlers/transcode.go	40.74074% <50.00000%> (ø)
transcode/manifest.go	72.41379% <100.00000%> (ø)

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Impacted Files	Coverage Δ
cache/transcoding.go	60.25641% <ø> (ø)
clients/broadcaster.go	0.00000% <0.00000%> (ø)
clients/broadcaster_local.go	0.00000% <0.00000%> (ø)
clients/broadcaster_remote.go	0.00000% <0.00000%> (ø)
clients/mist_client.go	49.14530% <ø> (ø)
transcode/transcode.go	43.58974% <46.51163%> (-1.14710%)	⬇️
handlers/misttriggers/recording_end.go	22.13115% <50.00000%> (+2.13115%)	⬆️
handlers/transcode.go	40.74074% <50.00000%> (ø)
transcode/manifest.go	72.41379% <100.00000%> (ø)