feat(batch): simplify BatchProcessor for async and sync functions

[am29d]

Description of your changes

This PR flips the syntax of the AsyncBatchProcessor and BatchProcessor. During the implementation we oriented around the python implementation and replicated the names. In Node ecosystem the case with async and sync is the opposite. Most of the function from libraries are async and there are cases where a sync suffix on a function indicates that it's a synchronous function.

Therefore we rename AsyncBatchProcessor to BatchProcessor and BatchProcessor to BatchProcessorSync.

Related issues, RFCs

Issue number: closes #1677

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my change is effective and works
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[dreamorosi]

Even though this was ultimately closed for the reasons discussed in #1680 I wanted to thank you for the time and effort put in the PR, I really appreciate the level of details.