upload: Allow overriding strategy on upload request

[victorges]

Depends on:

• upload: Allow overriding catalyst strategy on upload  studio#1537
• livepeer/go-api-client@dd68625
• pipeline,handlers: Allow overriding strategy on upload request catalyst-api#268

[codecov]

Codecov Report

Merging #97 (0b070e8) into main (f782ca2) will decrease coverage by 33.18315%.
The diff coverage is 18.69159%.

❗ Current head 0b070e8 differs from pull request most recent head 107f4eb. Consider uploading reports for the commit 107f4eb to get more accurate results

@@                 Coverage Diff                 @@
##                main        #97          +/-   ##
===================================================
- Coverage   38.64734%   5.46419%   -33.18315%     
===================================================
  Files              3         14          +11     
  Lines            207       1885        +1678     
===================================================
+ Hits              80        103          +23     
- Misses           119       1773        +1654     
- Partials           8          9           +1     

Impacted Files	Coverage Δ
clients/catalyst.go	94.82759% <ø> (ø)
task/prepare.go	0.00000% <0.00000%> (ø)
task/transcode.go	1.29310% <0.00000%> (ø)
task/upload.go	0.00000% <0.00000%> (ø)
task/runner.go	5.40541% <20.61856%> (ø)
task/readers.go	0.00000% <0.00000%> (ø)
task/probe.go	0.00000% <0.00000%> (ø)
task/import.go	0.00000% <0.00000%> (ø)
... and 6 more

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Impacted Files	Coverage Δ
clients/catalyst.go	94.82759% <ø> (ø)
task/prepare.go	0.00000% <0.00000%> (ø)
task/transcode.go	1.29310% <0.00000%> (ø)
task/upload.go	0.00000% <0.00000%> (ø)
task/runner.go	5.40541% <20.61856%> (ø)
task/readers.go	0.00000% <0.00000%> (ø)
task/probe.go	0.00000% <0.00000%> (ø)
task/import.go	0.00000% <0.00000%> (ø)
... and 6 more