Batch PR1: Add tfInnerBatchTxn to all transactions

[sappenin]

This is the first-of-three PRs required to implement Batch transactions (XLS-56). This PR adds the tfInnerBatchTxn to the base Transaction class, and ensures this flag works properly with all transaction classes that implement Transaction.

Before merging this, the following need to merge first:

• Fixes #666: Update definitions.json with new values #674
• Fixes #656 (Update Testcontainers + Jackson) #667
• Add ability to access flags from Transaction.java #690

After this PR, #654 and #676 can be merged.

[codecov]

Codecov Report

❌ Patch coverage is 99.09910% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.65%. Comparing base (4c1b8e8) to head (74a3bb7).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...n/java/org/xrpl/xrpl4j/model/flags/BatchFlags.java	97.22%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #653      +/-   ##
============================================
+ Coverage     92.53%   92.65%   +0.11%     
- Complexity     2103     2145      +42     
============================================
  Files           432      433       +1     
  Lines          5735     5840     +105     
  Branches        510      510              
============================================
+ Hits           5307     5411     +104     
  Misses          280      280              
- Partials        148      149       +1     

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[Patel-Raj11]

LGMT!