ci:validate conductor

[acpana]

Let's start adding some simple CI for conductor!

• as we all merge in yaml changes, let's have some validations

[google-oss-prow]

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[acpana]

Run ./experiments/conductor/scripts/verify-branches.sh
mkdir bin
GOWORK=off go build -o bin/conductor
go: downloading go1.24.2 (linux/amd[6](https://github.com/GoogleCloudPlatform/k8s-config-connector/actions/runs/15149419393/job/42592578713?pr=3874#step:4:7)4)
go: downloading github.com/spf13/cobra v1.8.1
go: downloading gopkg.in/yaml.v3 v3.0.1
go: downloading github.com/spf13/pflag v1.0.5
validating branches-all.yaml
2025/05/20 22:50:52 Running conductor runner with branch config: branches-all.yaml
2025/05/20 22:50:52 Starting Runner
2025/05/20 22:50:52 COMMAND: /usr/bin/ls -alh
2025/05/20 22:50:52 ls-alh: total [7](https://github.com/GoogleCloudPlatform/k8s-config-connector/actions/runs/15149419393/job/42592578713?pr=3874#step:4:8)96K
drwxr-xr-x 5 runner docker 4.0K May 20 22:50 .
drwxr-xr-x 7 runner docker 4.0K May 20 22:50 ..
-rw-r--r-- 1 runner docker  [8](https://github.com/GoogleCloudPlatform/k8s-config-connector/actions/runs/15149419393/job/42592578713?pr=3874#step:4:9)58 May 20 22:50 Makefile
-rw-r--r-- 1 runner docker 1.5K May 20 22:50 README.md
drwxr-xr-x 2 runner docker 4.0K May 20 22:50 bin
-rw-r--r-- 1 runner docker 757K May 20 22:50 branches-all.yaml
-rw-r--r-- 1 runner docker 2.3K May 20 22:50 branches.yaml
drwxr-xr-x 3 runner docker 4.0K May 20 22:50 cmd
-rw-r--r-- 1 runner docker 1.6K May 20 22:50 main.go
drwxr-xr-x 2 runner docker 4.0K May 20 22:50 scripts
2025/05/20 22:50:52 Uniqueness constrains violated for file branches-all.yaml