Deprecate flow-go/crypto

[tarakby]

This is part migrating the crypto module out of onflow/flow-go into onflow/crypto.
This PR makes the following updates:

• deprecate the module onflow/flow-go/crypto in favour of onflow/crypto (on go.mod)
• the new version of onflow/flow-go/crypto will be tagged as v0.25.1 (one this PR is merged) and will be the first non-supported version.
• update the ./crypto/Readme with deprecation details.
• delete all source files from ./crypto to accommodate the flow-go repo (exclude flow-go/crypto from the repo testing/CI)
• update the repo CI and Makefile by removing the crypto module related processes

Note: updating flow-go/ to use the new module onflow/crypto will be submitted in a subsequent PR

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (456c131) 56.31% compared to head (7f13305) 56.29%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5119      +/-   ##
==========================================
- Coverage   56.31%   56.29%   -0.02%     
==========================================
  Files         976      976              
  Lines       91752    91752              
==========================================
- Hits        51673    51656      -17     
- Misses      36253    36272      +19     
+ Partials     3826     3824       -2     

Flag	Coverage Δ
unittests	56.29% <ø> (-0.02%)	⬇️

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[turbolent]

Nice! 🚀