[receiver/vcenter] set feature gate to beta

[codeboten]

This was targetted to be enabled by default in v0.107.0... we are a few versions beyond that now.

[paulojmdias]

        	            	 -  resource "map[vcenter.cluster.name:Cluster vcenter.datacenter.name:Datacenter vcenter.resource_pool.inventory_path:/Datacenter/host/Cluster/Resources vcenter.resource_pool.name:Resources]": scope "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/vcenterreceiver": metric "vcenter.resource_pool.memory.usage": number of datapoints doesn't match expected: 1, actual: 3
        	            	 -  resource "map[vcenter.datacenter.name:Datacenter vcenter.host.name:esxi-111.europe-southeast1.gve.goog vcenter.resource_pool.inventory_path:/Datacenter/host/StandaloneHost/Resources vcenter.resource_pool.name:Resources]": scope "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/vcenterreceiver": metric "vcenter.resource_pool.memory.usage": number of datapoints doesn't match expected: 1, actual: 3
        	Test:       	TestScrape

Test should also be updated 👍

[codeboten]

Pinging code owners @schmikei @ishleenk17, please take a look

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 14 days.

[andrzej-stencel]

Thanks, can you update the ToVersion?

[schmikei]

@codeboten apologies for the delay,

Seems like after #47558 this PR needs a rebase to work with mdatagen along with the stability bump for this effort.

Also apologies I was not involved in the original #33741 so that also appeared to have been missed. Once again apologies for the delayed review and thank you for noticing it!

[codeboten]

Thanks @schmikei, please take a look i've updated the PR to update metadata and re-ran make generate