NETSCRIPT: Add ramOverride as a RunOption (#441)

Allows overriding the static ram calculation. Dynamic ram limit still applies.

src/Netscript/WorkerScript.ts

@@ -71,9 +71,6 @@ export class WorkerScript {
    */
   pid: number;
 
-  /** Script's Static RAM usage. Equivalent to underlying script's RAM usage */
-  ramUsage = RamCostConstants.Base;
-
   /** Reference to underlying RunningScript object */
   scriptRef: RunningScript;