Add documentation for Azure config specs

[vsmalladi]

Description of feature

Add Azure specifc Sarek pipeline VM_sizes documentation

azure {
    batch {
        pools {
            auto {
               autoScale = true

               sku = "batch.node.centos 7"

               offer = "centos-container"

               publisher = "microsoft-azure-batch"

               vmType = 'Standard_E64_v3'

               vmCount = 1

            }
        }
    }
}

[vsmalladi]

Dependent on extending azure config: nf-core/configs#406

[drpatelh]

Thanks @vsmalladi ! Be awesome if you are able to upload the full command / .nextflow.log file here which will contain more extensive information as to which versions of the pipeline, NF and the command used.

[vsmalladi]

Sarek version: 3.0.1
NExtflow Version: 22.04.3.5703

Command:
nextflow run sarek/main.nf -c azure.config -w "az://work" --outdir "az://results" --tools haplotypecaller --input sarek.csv