refactoring spendreporting for WOR-430 (#2027)

* simplified unit tests to require less mocking

* made spend report aggregation static and remove slickDatasource from some tests

makes it obvious that the aggregation doesn't use any class resources, and shaves multiple seconds off unit tests

* finished removing usages of TestDriverComponent

Tests for spend reports are now completely mocked, with no external db calls

* add metrics to spend reporting service

* moved query specific logic to query building function

* move query setup to a separate function

* add convenience methods to create rawls exceptions

avoids the intermediary step of having to explicitly create the error report

core/src/main/scala/org/broadinstitute/dsde/rawls/Boot.scala

@@ -482,7 +482,8 @@ object Boot extends IOApp with LazyLogging {
       val spendReportingServiceConfig = SpendReportingServiceConfig(
         gcsConfig.getString("billingExportTableName"),
         gcsConfig.getString("billingExportTimePartitionColumn"),
-        gcsConfig.getConfig("spendReporting").getInt("maxDateRange")
+        gcsConfig.getConfig("spendReporting").getInt("maxDateRange"),
+        metricsPrefix,
       )
 
       val spendReportingServiceConstructor: RawlsRequestContext => SpendReportingService =

core/src/main/scala/org/broadinstitute/dsde/rawls/config/SpendReportingServiceConfig.scala

@@ -1,6 +1,8 @@
 package org.broadinstitute.dsde.rawls.config
 
-final case class SpendReportingServiceConfig(defaultTableName: String,
-                                             defaultTimePartitionColumn: String,
-                                             maxDateRange: Int
+final case class SpendReportingServiceConfig(
+  defaultTableName: String,
+  defaultTimePartitionColumn: String,
+  maxDateRange: Int,
+  workbenchMetricBaseName: String
 )