Update addresses for veSDL contracts deployed on MainNet

[nguyenaiden]

Description: veSDL related contracts have been deployed on MainNet. This has added those addresses for:

• VotingEscrow
• GaugeController
• Minter
• FeeDistributor
• GaugeHelperContract

Additionally:

• All uses of HelperContract has been converted to GaugeHelperContract
• Deleted extraneous MinterAddress in constant file as they were duplicates

[codecov[bot]]

Codecov Report

Merging #1105 (a273ba4) into master (b2eddbb) will decrease coverage by 0.02%. The diff coverage is 4.54%.

@@            Coverage Diff             @@
##           master    #1105      +/-   ##
==========================================
- Coverage   10.66%   10.64%   -0.03%     
==========================================
  Files         150      150              
  Lines        5317     5319       +2     
  Branches     1671     1688      +17     
==========================================
- Hits          567      566       -1     
- Misses       4750     4751       +1     
- Partials        0        2       +2     

Impacted Files	Coverage Δ
src/components/TokenClaimDialog.tsx	0.00% <0.00%> (ø)
src/components/TopMenu.tsx	0.00% <0.00%> (ø)
src/hooks/useContract.ts	3.86% <ø> (+0.08%)	:arrow_up:
src/providers/GaugeProvider.tsx	5.00% <0.00%> (ø)
src/utils/gauges.ts	1.05% <0.00%> (ø)
src/utils/updateTokenPrices.ts	0.00% <ø> (ø)
src/constants/index.ts	94.70% <100.00%> (-0.02%)	:arrow_down:
src/hooks/useWithdrawFormState.ts	0.00% <0.00%> (ø)
src/pages/CreatePool/CreatePoolDialog.tsx	0.00% <0.00%> (ø)

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