Merge pull request MaterializeInc#24880 from def-/pr-buildkite-costs-update

buildkite-costs: Update some instance costs

Author: def-

ci/plugins/cloudtest/README.md

@@ -1,4 +1,4 @@
-# mzcompose Buildkite Plugin
+# cloudtest Buildkite Plugin
 
 A [Buildkite plugin] that runs cloudtest.
 

misc/python/materialize/buildkite_insights/costs/extract_stats.py

@@ -20,20 +20,29 @@
     "c5.12xlarge": 2.040,
     "c5a.2xlarge": 0.308,
     "c5a.8xlarge": 1.232,
+    "c6a.large": 0.0765,
+    "c6a.xlarge": 0.153,
     "c6a.2xlarge": 0.306,
     "c6a.8xlarge": 1.224,
     "c6a.12xlarge": 1.836,
+    "c7g.large": 0.0725,
+    "c6g.xlarge": 0.1360,
+    "c7g.xlarge": 0.1450,
     "c6g.2xlarge": 0.272,
     "c7g.2xlarge": 0.290,
     "c6g.8xlarge": 1.088,
     "c6g.12xlarge": 1.632,
+    "c7g.12xlarge": 1.740,
+    "c7g.16xlarge": 2.320,
     "m5.4xlarge": 0.768,
     "m5a.8xlarge": 1.376,
     "m6a.8xlarge": 1.382,
     "m7a.8xlarge": 1.855,
     "m6g.4xlarge": 0.616,
     "m6g.8xlarge": 1.232,
     "m7g.8xlarge": 1.306,
+    "m6g.12xlarge": 1.848,
+    "m7g.12xlarge": 1.958,
     "m6i.4xlarge": 0.768,
     "m6i.12xlarge": 2.304,
     "m7i.8xlarge": 1.613,