Y24-190-3: Use API v2 for BulkTransfers

[sdjmchattie]

Closes https://github.com/sanger/limber/issues/1818

Changes proposed in this pull request

• Add an endpoint for BulkTransfer.
• Use the new endpoint instead of v1.
• Update tests to work with the new endpoint expectations.

Instructions for Reviewers

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code

[codecov[bot]]

Codecov Report

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

Project coverage is 78.07%. Comparing base (3e056b3) to head (abf6261). Report is 20 commits behind head on develop-Y24-190.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop-Y24-190 #2009 +/- ## =================================================== + Coverage 77.98% 78.07% +0.09% =================================================== Files 465 466 +1 Lines 17716 17790 +74 Branches 225 225 =================================================== + Hits 13815 13890 +75 + Misses 3899 3898 -1 Partials 2 2 ``` | [Flag](https://app.codecov.io/gh/sanger/limber/pull/2009/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | Coverage Δ | | |---|---|---| | [javascript](https://app.codecov.io/gh/sanger/limber/pull/2009/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `69.89% <100.00%> (+0.20%)` | :arrow_up: | | [pull_request](https://app.codecov.io/gh/sanger/limber/pull/2009/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `78.07% <100.00%> (?)` | | | [push](https://app.codecov.io/gh/sanger/limber/pull/2009/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `78.07% <100.00%> (+0.09%)` | :arrow_up: | | [ruby](https://app.codecov.io/gh/sanger/limber/pull/2009/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `91.16% <100.00%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger#carryforward-flags-in-the-pull-request-comment) to find out more.

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