moved all flips in this repo to onflow/flips

[vishalchangrani]

There are three FLIPS in the onflow/flow-go repo. This PR moved them to the onflow/flips repo where they belong.

PRs on the onflow/flips repo that moved these FLIPs to the onflow/flips repo:

1. Moving FLIP 1167 from the onflow/flow-go repo to this repo flips#189
2. Moving FLIP 1306 from onflow/flow-go to onflow/flips flips#191
3. Moving FLIP 1697 from onflow/flow-go to onflow/flips flips#193

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6cbb9d7) 56.63% compared to head (f1fd327) 56.16%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4686      +/-   ##
==========================================
- Coverage   56.63%   56.16%   -0.47%     
==========================================
  Files         339      925     +586     
  Lines       30843    87710   +56867     
==========================================
+ Hits        17467    49265   +31798     
- Misses      12014    34730   +22716     
- Partials     1362     3715    +2353     

Flag	Coverage Δ
unittests	56.16% <ø> (-0.47%)	⬇️

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