test: Adding rpcs test to csharp #2893

Job	Run time
Verify Versions	21s
Format C++	16s
Format C#	3m 0s
Format Protobuf	5s
Check linting, formatting and typing	20s
Format and check Rust (stable)	2m 11s
Build Angular	31s
Format and check Rust (nightly)	1m 55s
Build C++ Packages [tar.gz]	1m 27s
Build C++ Packages [deb]	1m 59s
Build C++ Packages [rpm]	2m 30s
Build Web	31s
Lint JS	16s
Build Java	41s
	16m 3s

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