build(plugin-keychain-memory-wasm): upgrade OpenAPI generator to 5.2.1

[petermetz]

The current version (5.2.0) of the OpenAPI generator used for generating the Rust server-side code of the plugin-keychain-memory-wasm module should be upgraded to the newer one that @jagpreetsinghsasan has upgraded in a separate pull request to be 5.2.1

The upgrade for plugin-keychain-memory-wasm is not trivial (e.g. it's not just about bumping some version number in a config file) because the entire process of generating the code under packages/cactus-plugin-keychain-memory-wasm/src/main/rust/generated/openapi/rust-server was done through an undocumented and unscripted manual process at the time.

Acceptance criteria:

1. The build still works and the generated code now uses the OpenAPI generator v5.2.1
2. packages/cactus-plugin-keychain-memory-wasm/src/main/rust/generated/openapi/rust-server/.openapi-generator/VERSION also shows the updated version number from point 1 above.

[jagpreetsinghsasan]

The current openapi-generator version is 6.6.0

[jmoagacn]

I would like to take on this issue, thanks!

[solo-daemon]

Hi @petermetz @jagpreetsinghsasan i tried to work on this issue and when i ran npm run generate-rust-server it automatically generated the code with the latest version of openapi generator but on checking git diff i realize some intentional changes were made to the generated code so we have to incorporate those changes into our generated code. Am i getting it right?

[petermetz]

@solo-daemon Yes, apologies about the documentation not making this clear. We do not yet have a code structure/architecture in place for this package where the generated vs. hand-written Rust code co-exist in a way that the incorporation you mentioned is automatic. So, yes, you have to put in the implementation code again manually after a fresh code generation.