feat: add vmcluster module (#363)

- manage vmstorage package, service and environment file
- manage vmselect package, service and environment file
- manage vminsert package, service and environment file
- manage vmagent package, service and environment file
- manage options for vmstorage, vmselect, vminsert, vmagent role

Reviewed-on: #363

modules/vmcluster/templates/options.erb

@@ -0,0 +1,18 @@
+<%
+  opts = @options || {}
+  lines = []
+
+  opts.each do |key, val|
+    flag = "-#{key}"
+
+    if val.is_a?(Array)
+      val.each do |v|
+        lines << "#{flag}=#{v}"
+      end
+    else
+      lines << "#{flag}=#{val}"
+    end
+  end
+%>
+OPTIONS="<%= lines.map { |l| l.lstrip }.join(" \\\n  ") %>"
+