(feat)Indexer: Add `raw_transaction_sigs` column and switch `raw_transaction` to BCS serialize TransactionData

[stefan-mysten]

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Description

Adds one column for raw_transaction_sigs representing the BCS bytes of Vec<GenericSignature>. Switches from BCS serializing SenderSignedData to TransactionData for raw_transaction.

Test plan

Existing tests.

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Release notes

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• [ ] Protocol:
• [ ] Nodes (Validators and Full nodes):
• [ ] Indexer:
• [ ] JSON-RPC:
• [ ] GraphQL:
• [ ] CLI:
• [ ] Rust SDK:
• [ ] REST API:

[codecov-commenter]

Codecov Report

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

Project coverage is 84.79%. Comparing base (ff314a2) to head (8d2c4b4).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1726      +/-   ##
==========================================
+ Coverage   84.76%   84.79%   +0.02%     
==========================================
  Files         378      379       +1     
  Lines       19742    19773      +31     
  Branches     2955     2962       +7     
==========================================
+ Hits        16735    16766      +31     
  Misses       3007     3007              

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[pomkarnath98]

@raklaptudirm @appgurueu please review and merge