feat(ops/buildkite): Import main depot pipeline

Change-Id: Id470750aa90505002c6a7e4f840e56c4939ed391
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5840
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

ops/buildkite/steps-depot.yml

@@ -0,0 +1,6 @@
+---
+steps:
+  - label: ":buildkite:"
+    key: ":init:"
+    command: |
+      buildkite-agent pipeline upload ops/pipelines/static-pipeline.yaml

ops/buildkite/tvl.tf

@@ -22,3 +22,10 @@ terraform {
 provider "buildkite" {
   organization = "tvl"
 }
+
+resource "buildkite_pipeline" "depot" {
+  name        = "depot"
+  description = "Run full CI pipeline of the depot, TVL's monorepo."
+  repository  = "https://cl.tvl.fyi/depot"
+  steps       = file("./steps-depot.yml")
+}