Balancer Composable stable pool strategy

[sparrowDom]

Adds support for Balancer's Composable stable pools.

Connected PR: https://github.com/OriginProtocol/origin-dollar/pull/1849

[github-actions[bot]]

	Warnings
:warning:	:eyes: This PR needs at least 2 reviewers

Generated by :no_entry_sign: dangerJS against a3b31971cfa89c6dc38ab535b7dfb3a021c767d6

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a677d87) 69.40% compared to head (a3b3197) 71.23%. Report is 18 commits behind head on master.

:exclamation: Current head a3b3197 differs from pull request most recent head 8b94037. Consider uploading reports for the commit 8b94037 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1839      +/-   ##
==========================================
+ Coverage   69.40%   71.23%   +1.83%     
==========================================
  Files          55       56       +1     
  Lines        2811     2844      +33     
  Branches      726      736      +10     
==========================================
+ Hits         1951     2026      +75     
+ Misses        857      814      -43     
- Partials        3        4       +1     

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[sparrowDom]

@shahthepro the fork tests related to this PR have been fixed

[naddison36]

Closing as we are no longer doing this strategy