add testcontainers/ryuk:0.10.2 to allowed images list

[Kehrlann]

What does this PR do?

Add testcontainers/ryuk:0.10.2 to allowed images list. No grype failures detected as of 2024-10-11:

$ grype testcontainers/ryuk:0.10.2
 ✔ Vulnerability DB                [updated]  
 ✔ Pulled image                    
 ✔ Loaded image                                                                                   testcontainers/ryuk:0.10.2
 ✔ Parsed image                                      sha256:61474639f5c88956870c4e99f4c00ba9f003ef0998fd31490fea9aebdc4f8679
 ✔ Cataloged contents                                       3930e92afc1cc6e6b7a91c973db3d63f9eccc2a713667c7d6fa7acf5a4bd1770
   ├── ✔ Packages                        [34 packages]  
   ├── ✔ File digests                    [230 files]  
   ├── ✔ File metadata                   [230 locations]  
   └── ✔ Executables                     [20 executables]  
 ✔ Scanned for vulnerabilities     [0 vulnerability matches]  
   ├── by severity: 0 critical, 0 high, 0 medium, 0 low, 0 negligible
   └── by status:   0 fixed, 0 not-fixed, 0 ignored 
No vulnerabilities found

Code sections where the PR accesses files, network, docker or some external service

n/a

Checklist before merging

• I am the original author of all content provided in the pull request, and I did not copy the content from any other source (see the tests section from our contributing document)

Not applicable:

• I have considered including reachability metadata directly in the library or the framework (see our contributing document)
• For all tests where I am not the sole author, I have added a comment that proves I may publish them under the specified license (see the tests section from our contributing document)
• I have properly formatted metadata files (see our formatting guide)
• I have added thorough tests (see the tests section from our contributing document)
• I have filled all places where my pull request accesses files, network, docker, or any other external service (see the section above)

[Kehrlann]

Updated to ryuk:0.10.2 which brings bugfixes around the lifecycle of the image.

[matneu]

What is ryuk required for?

[Kehrlann]

Hey @matneu!

Ryuk is Testcontainer's "garbage collector" docker image, that reaps unused containers when they are unused. While containers may be stopped manually, Ryuk is part of the default setup of Testcontainers and ensures containers are cleaned up. It's mentioned in this section of their docs: https://testcontainers.com/getting-started/#benefits-of-using-testcontainers .
It is used by tests in #546

Note that test could run without Ryuk but would not represent the default usage of the library.