Feat: make distributionRoots internal

[ypatil12]

Make distributionRoots internal so we can expose public getters.

Prev PR had duplicated bytecode. h/t @8sunyuan for the suggestion :)

[8sunyuan]

TY for this, just need updated bindings though and lgtm

[github-actions]

Reading tracefile ./lcov.info.pruned
                                             |Lines      |Functions|Branches  
Filename                                       |Rate    Num|Rate  Num|Rate   Num
================================================================================
[src/contracts/]
core/AVSDirectory.sol                          |77.8%    27|77.8%   9|    -    0
core/AVSDirectoryStorage.sol                   | 0.0%     1| 0.0%   1|    -    0
core/DelegationManager.sol                     |96.4%   196|92.3%  39|    -    0
core/DelegationManagerStorage.sol              | 100%     3| 100%   1|    -    0
core/RewardsCoordinator.sol                    |93.5%   108|83.3%  30|    -    0
core/RewardsCoordinatorStorage.sol             | 0.0%     9| 0.0%   1|    -    0
core/StrategyManager.sol                       |95.2%    83|95.8%  24|    -    0
core/StrategyManagerStorage.sol                | 0.0%     3| 0.0%   1|    -    0
libraries/BeaconChainProofs.sol                |95.5%    44|91.7%  12|    -    0
libraries/BytesLib.sol                         | 8.0%    50| 7.1%  14|    -    0
libraries/EIP1271SignatureUtils.sol            | 100%     3| 100%   1|    -    0
libraries/Endian.sol                           | 100%     3| 100%   1|    -    0
libraries/Merkle.sol                           | 100%    30| 100%   5|    -    0
libraries/StructuredLinkedList.sol             | 0.0%    45| 0.0%  19|    -    0
permissions/Pausable.sol                       |95.7%    23|90.9%  11|    -    0
permissions/PauserRegistry.sol                 | 100%    12| 100%   6|    -    0
pods/DelayedWithdrawalRouter.sol               |93.2%    59|85.7%  14|    -    0
pods/EigenPod.sol                              | 100%   150| 100%  33|    -    0
pods/EigenPodManager.sol                       |98.8%    84|89.5%  19|    -    0
pods/EigenPodManagerStorage.sol                | 0.0%     5| 0.0%   1|    -    0
strategies/EigenStrategy.sol                   | 0.0%    10| 0.0%   5|    -    0
strategies/StrategyBase.sol                    |89.7%    39|77.8%  18|    -    0
strategies/StrategyBaseTVLLimits.sol           | 100%    12|83.3%   6|    -    0
token/BackingEigen.sol                         |72.0%    25|50.0%  10|    -    0
token/Eigen.sol                                |38.5%    39|50.0%  12|    -    0
utils/UpgradeableSignatureCheckingUtils.sol    | 0.0%     6| 0.0%   4|    -    0
================================================================================
                                       Total:|82.0%  1069|73.7% 297|    -    0

[github-actions]

Reading tracefile ./lcov.info.pruned
                                             |Lines      |Functions|Branches  
Filename                                       |Rate    Num|Rate  Num|Rate   Num
================================================================================
[src/contracts/]
core/AVSDirectory.sol                          |77.8%    27|77.8%   9|    -    0
core/AVSDirectoryStorage.sol                   | 0.0%     1| 0.0%   1|    -    0
core/DelegationManager.sol                     |96.4%   196|92.3%  39|    -    0
core/DelegationManagerStorage.sol              | 100%     3| 100%   1|    -    0
core/RewardsCoordinator.sol                    |93.5%   108|83.3%  30|    -    0
core/RewardsCoordinatorStorage.sol             | 0.0%     9| 0.0%   1|    -    0
core/StrategyManager.sol                       |95.2%    83|95.8%  24|    -    0
core/StrategyManagerStorage.sol                | 0.0%     3| 0.0%   1|    -    0
libraries/BeaconChainProofs.sol                |95.5%    44|91.7%  12|    -    0
libraries/BytesLib.sol                         | 8.0%    50| 7.1%  14|    -    0
libraries/EIP1271SignatureUtils.sol            | 100%     3| 100%   1|    -    0
libraries/Endian.sol                           | 100%     3| 100%   1|    -    0
libraries/Merkle.sol                           | 100%    30| 100%   5|    -    0
libraries/StructuredLinkedList.sol             | 0.0%    45| 0.0%  19|    -    0
permissions/Pausable.sol                       |95.7%    23|90.9%  11|    -    0
permissions/PauserRegistry.sol                 | 100%    12| 100%   6|    -    0
pods/DelayedWithdrawalRouter.sol               |93.2%    59|85.7%  14|    -    0
pods/EigenPod.sol                              | 100%   150| 100%  33|    -    0
pods/EigenPodManager.sol                       |98.8%    84|89.5%  19|    -    0
pods/EigenPodManagerStorage.sol                | 0.0%     5| 0.0%   1|    -    0
strategies/EigenStrategy.sol                   | 0.0%    10| 0.0%   5|    -    0
strategies/StrategyBase.sol                    |89.7%    39|77.8%  18|    -    0
strategies/StrategyBaseTVLLimits.sol           | 100%    12|83.3%   6|    -    0
token/BackingEigen.sol                         |72.0%    25|50.0%  10|    -    0
token/Eigen.sol                                |38.5%    39|50.0%  12|    -    0
utils/UpgradeableSignatureCheckingUtils.sol    | 0.0%     6| 0.0%   4|    -    0
================================================================================
                                       Total:|82.0%  1069|73.7% 297|    -    0