Add benchmark for containerized KRM function in kustomize

hack/krmFunctionBenchmark/example_tshirt/execfn/Dockerfile

@@ -0,0 +1,16 @@
+FROM alpine:latest
+
+ENV BUILD_HOME=/usr/local/build
+RUN apk update && apk add --no-cache git go
+
+RUN mkdir -p $BUILD_HOME
+
+WORKDIR $BUILD_HOME
+
+RUN git clone https://github.com/kubernetes-sigs/kustomize.git .
+RUN git checkout tags/kustomize/v3.6.1
+WORKDIR $BUILD_HOME/functions/examples/injection-tshirt-sizes/image/
+
+ENV CGO_ENABLED=0
+RUN go mod download
+RUN go build -o tshirt .

hack/krmFunctionBenchmark/example_tshirt/execfn/build.sh

@@ -0,0 +1,8 @@
+#! /bin/bash
+
+IMAGE_LABEL="tshirt_example_build:latest"
+BUILD_HOME=/usr/local/build
+
+docker build -t $IMAGE_LABEL .
+
+docker run --rm -v $(pwd):/out $IMAGE_LABEL cp -r $BUILD_HOME/functions/examples/injection-tshirt-sizes/image/tshirt /out

hack/krmFunctionBenchmark/example_tshirt/execfn/data.yaml

@@ -0,0 +1,20 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+  annotations:
+    tshirt-size: small # this injects the resource reservations
+spec:
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx

hack/krmFunctionBenchmark/example_tshirt/execfn/kustomization.yaml

@@ -0,0 +1,4 @@
+resources:
+- data.yaml
+transformers:
+- transf.yaml

hack/krmFunctionBenchmark/example_tshirt/execfn/transf.yaml

@@ -0,0 +1,8 @@
+apiVersion: examples.config.kubernetes.io/v1beta1
+kind: tshirt
+metadata:
+  name: tshirt
+  annotations:
+    config.kubernetes.io/function: |-
+      exec:
+        path: ./tshirt