bci2: Add resources argument

Instead of a top-level boolean that says whether or not the build
can/should run on a Raspberry Pi, we'll expose a `resources` argument
that allows jobs to specify their compute requirements.  If they're not
specified, then the job can run anywhere.  Otherwise, if the
requirements are too large for a Pi, then the autoscaler will launch a
cloud worker to handle the build.

vars/buildContainerImage2.groovy

@@ -9,6 +9,7 @@ def call(args) {
     def schedule = args?.schedule
     def defaultBranch = args?.defaultBranch
     def pi = args?.pi
+    def resources = args?.resources
 
     properties([
         pipelineTriggers([cron(schedule ?: 'H H H * *')])
@@ -32,9 +33,6 @@ def call(args) {
     if (defaultBranch == null) {
         defaultBranch = 'main'
     }
-    if (pi == null) {
-        pi = true
-    }
     def repo = "${registry}/${project}/${name}"
     def full_name = "${repo}:${tag}"
 
@@ -48,14 +46,14 @@ def call(args) {
                     full_name: full_name,
                     registry: registry,
                     arch: arch,
-                    pi: pi,
+                    resources: resources,
                 )
             }
         }
     }
     parallel stages
 
-    runInPod(pi: false) {
+    runInPod() {
         container('buildah') {
             withBuildahCreds(registry) {
                 if (archlist.size() > 1) {
@@ -96,9 +94,9 @@ def buildStage(args) {
     def full_name = args.full_name
     def registry = args.registry
     def arch = args.arch
-    def pi = args.pi
+    def resources = args?.resources
 
-    runInPod(arch: arch, pi: pi) {
+    runInPod(arch: arch, resources: resources) {
         checkout scm
 
         container('buildah') {
@@ -113,21 +111,17 @@ def buildStage(args) {
 
 def runInPod(args, block) {
     def arch = args?.arch
-    def pi = args?.pi
-    if (pi == null) {
-        pi = true
-    }
+    def resources = args?.resources
 
     def podTemplateYaml = libraryResource('podTemplate2.yaml')
-    if (pi) {
+    if (resources) {
         def tmpl = readYaml(text: podTemplateYaml)
-        def tolerations = tmpl['spec']['tolerations'] ?: []
-        tolerations.push([
-            key: 'du5t1n.me/machine',
-            value: 'raspberrypi',
-            effect: 'NoExecute',
-        ])
-        tmpl['spec']['tolerations'] = tolerations
+        tmpl.spec.containers.each {
+            it.resources = [
+              requests = resources,
+              limits = resources,
+            ]
+        }
         podTemplateYaml = writeYaml(data: tmpl, returnText: true)
     }
     podTemplate(