[ci][8.x] Increase disk allocation (#220483)

## Summary
We're around the 75g allocation limit with the VM image sizes after
cache warmups. This is appears often depleted on 8.x branches,
especially on PRs where non-cached packages might be introduced.

This PR adds extra disk allocation for all tasks that are generating
output, and at the risk of reaching over the slim free space.

Author: delanni

.buildkite/pipelines/on_merge.yml

@@ -40,7 +40,7 @@ steps:
       provider: gcp
       machineType: n2-highcpu-8
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     timeout_in_minutes: 60
     retry:
       automatic:
@@ -70,7 +70,7 @@ steps:
       provider: gcp
       machineType: n2-standard-16
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     timeout_in_minutes: 60
     retry:
       automatic:
@@ -85,7 +85,7 @@ steps:
       provider: gcp
       machineType: n2-standard-32
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     timeout_in_minutes: 60
     retry:
       automatic:
@@ -102,7 +102,7 @@ steps:
       diskType: 'hyperdisk-balanced'
       preemptible: true
       spotZones: us-central1-a,us-central1-b,us-central1-c
-      diskSizeGb: 75
+      diskSizeGb: 80
     timeout_in_minutes: 60
     retry:
       automatic:
@@ -135,7 +135,7 @@ steps:
       provider: gcp
       machineType: n2-highmem-4
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     timeout_in_minutes: 80
     retry:
       automatic:

.buildkite/pipelines/pull_request/base.yml

@@ -27,7 +27,7 @@ steps:
     agents:
       machineType: n2-highcpu-8
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     key: quick_checks
     timeout_in_minutes: 60
     retry:
@@ -53,7 +53,7 @@ steps:
     agents:
       machineType: n2-standard-16
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     key: linting
     timeout_in_minutes: 60
     retry:
@@ -66,7 +66,7 @@ steps:
     agents:
       machineType: n2-standard-32
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     key: linting_with_types
     timeout_in_minutes: 60
     retry:
@@ -94,7 +94,7 @@ steps:
       diskType: 'hyperdisk-balanced'
       preemptible: true
       spotZones: us-central1-a,us-central1-b,us-central1-c
-      diskSizeGb: 75
+      diskSizeGb: 80
     key: check_types
     timeout_in_minutes: 60
     retry:
@@ -138,7 +138,7 @@ steps:
     agents:
       machineType: n2-highmem-4
       preemptible: true
-      diskSizeGb: 75
+      diskSizeGb: 80
     key: build_api_docs
     timeout_in_minutes: 90
     retry: