Update yaml to v3

[CoreFloDev]

Hi,

I have updated to Yaml v3 as I already have dependencies using it on my project and I don't see the advantage of using both at the same time.

I have made the change based on this:
https://github.com/grafana/mimir/pull/2468/files#diff-b6523cb0f118ebcaa2aa648d3810f1ac33a06a9e4ae19b11f0205c90014d879e

I have:

• Added tests covering the bug / feature (see testing)
• Updated any relevant documentation (see docs)

[coveralls]

Coverage increased (+0.09%) to 75.463% when pulling c00ea6d on CoreFloDev:feat/update-to-yaml-v3 into 7949117 on 99designs:master.

[CoreFloDev]

Hi,

I don't see how to execute that test :

--- FAIL: TestSubscriptions (2.02s)
    --- FAIL: TestSubscriptions/websocket_gets_errors (2.01s)
        subscription_test.go:192: 
            	Error Trace:	subscription_test.go:192
            	Error:      	Not equal: 
            	            	expected: 8
            	            	actual  : 3
            	Test:       	TestSubscriptions/websocket_gets_errors

I can't find it on codegen/testserver, is there something specific to do to get it?

[StevenACoffman]

Thanks!