Port code from external bribe to both bribe contracts and test fix.

[bitdeep]

This PR is just for velo dev team to review if our implementation of a fix for bribes issues is correctly implemented and should not be merged.

• Copy earned code from WrappedExternalBribes external bribe to ExternalBribes.
• Copy code from ExternalBribes to InternalBribe.
• Add a if to check supply in earned loop to prevent div by 0 in test Pair.t.sol
• Commented out batchRewardPerToken calls in WashTrade.t.sol at testBribeClaimRewards as seems that we don't use this functions in the ui.
• Removed redemption contracts and tests as we don't need this features.

Tests that's are not passing:

• test/WrappedExternalBribes.t.sol at function testOldBribesAreBroken() that's break in the last assertEq of the test.

[bitdeep]

I think that I know why testOldBribesAreBroken is not passing:

• Initially we do a deposit of 1 LR via notifyRewardAmount.
• later, we do 2 votes for tokenId 1 and 2.
• Later, we call getRewardForOwner twice on tokenId 1, that should pay only 0.5 LR.
• just adding a TOKEN/2 to the test should solve the test as bribes are ok now.