Fix ABI selection, don't use isMigrated

[hammeiam]

• isMigrated is not indicative of ABI type
• Remove isLegacy in favor of clearer isGuarded and isWithdrawFee which more closely aligns with ABI types

[codecov[bot]]

Codecov Report

Merging #1247 (6b0692b) into master (a3d2580) will decrease coverage by 0.01%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1247      +/-   ##
==========================================
- Coverage   10.22%   10.21%   -0.02%     
==========================================
  Files         162      162              
  Lines        6110     6116       +6     
  Branches     2015     2015              
==========================================
  Hits          625      625              
- Misses       5483     5489       +6     
  Partials        2        2              

Impacted Files	Coverage Δ
src/constants/index.ts	96.11% <0.00%> (-0.54%)	:arrow_down:
src/hooks/useApproveAndDeposit.ts	0.00% <0.00%> (ø)
src/hooks/useWithdrawFormState.ts	0.00% <0.00%> (ø)
src/pages/Deposit.tsx	0.00% <0.00%> (ø)
src/pages/Withdraw.tsx	0.00% <0.00%> (ø)
src/providers/BasicPoolsProvider.tsx	0.71% <0.00%> (-0.03%)	:arrow_down:
src/utils/index.ts	36.65% <0.00%> (ø)

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