Created add_prs_to_tech_debt_project.yml to add dependency updates to the technical debt project

[seenanair]

Closes https://github.com/sanger/General-Backlog-Items/issues/383

This PR includes the following:

• Adds an 'add_prs_to_tech_debt_project.yml' file, which adds Depfu-generated dependency update PRs to the 'Technical Debt' project board.

[codecov[bot]]

Codecov Report

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

Project coverage is 91.21%. Comparing base (da56a17) to head (ccf84c4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1726 +/- ## ======================================== Coverage 91.21% 91.21% ======================================== Files 364 364 Lines 7543 7543 ======================================== Hits 6880 6880 Misses 663 663 ``` | [Flag](https://app.codecov.io/gh/sanger/limber/pull/1726/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/1726/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `93.65% <ø> (ø)` | | | [pull_request](https://app.codecov.io/gh/sanger/limber/pull/1726/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `91.19% <ø> (?)` | | | [push](https://app.codecov.io/gh/sanger/limber/pull/1726/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `91.21% <ø> (ø)` | | | [ruby](https://app.codecov.io/gh/sanger/limber/pull/1726/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sanger) | `90.86% <ø> (ø)` | | 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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[codeclimate[bot]]

Code Climate has analyzed commit ccf84c47 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 90.8% (0.0% change).

View more on Code Climate.