Sponsorship vector implementation

[simonsso]

• tests for positive case where all pass
• test where some jobs pass but on fails and all is rolled back
• benchmark

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.84%. Comparing base (304dfc1) to head (7cc3738).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #836      +/-   ##
==========================================
+ Coverage   63.95%   64.84%   +0.88%     
==========================================
  Files          58       58              
  Lines       11589    11880     +291     
==========================================
+ Hits         7412     7703     +291     
  Misses       4177     4177              

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[simonsso]

Batch mode, I think we only need to support batch-all mode from utility pallet.

• batch_all: Stops on error and reverts everything (all-or-nothing).
• force_batch: Does not stop on error and only reverts the failed calls (keep-going).
• batch: Stops on error and only reverts the first failed call (fail-fast).
  ref

[aliXsed]

@simonsso it's a nice clear approach. I like it. I have just added some comments to improve the tests.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.03%. Comparing base (98dd59e) to head (4917746).
Report is 6 commits behind head on master.

❗ Current head 4917746 differs from pull request most recent head 49dd6d3. Consider uploading reports for the commit 49dd6d3 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #836      +/-   ##
==========================================
+ Coverage   68.20%   69.03%   +0.83%     
==========================================
  Files          58       58              
  Lines        9356     9609     +253     
==========================================
+ Hits         6381     6634     +253     
  Misses       2975     2975              

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