Txn emitter changes for it to be used for bulk emitter script

[igor-aptos]

Description

Create generic bulk_create_accounts, that anyone can use, without having EmitterJobRequest params object.
(we use this later for creating worker accounts)

Type of Change

• Refactoring

Which Components or Systems Does This Change Impact?

• Other - transaction generator/emitter

How Has This Been Tested?

with end-to-end bulk submit script

Key Areas to Review

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

[trunk-io]

⏱️ 17m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	5m	🟥
run-tests-main-branch	4m	🟩
rust-targeted-unit-tests	3m	🟥
rust-lints	3m	🟥
general-lints	2m	🟩
semgrep/ci	22s	🟩
check-dynamic-deps	19s	🟩
file_change_determinator	12s	🟩
file_change_determinator	10s	🟩
permission-check	4s	🟩
permission-check	3s	🟩
permission-check	2s	🟩
permission-check	2s	🟩

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[igor-aptos]

ping @sitalkedia , @bchocho for reviews here

[sitalkedia]

LG