[7.17](backport #39332) More resilient DRA packaging (#39339)

Occasionally packaging steps from the DRA pipeline may get stuck[^1].
This causes a breach of the global pipeline timeout (currently 1hr) and
cancels the job.

This commit increases the global timeout to 90min, adds one retry per
step and limits the runtime per step to 40min (so that a single stuck
step doesn't exhaust the entire global timeout).

Finally, we shush slack notifications if the retry recovered the step.

In a future PR we will consider also adding a daily DRA build to cover
for cases where the retries didn't help and there were no subsequent
commits to trigger a new build.

[^1]: https://buildkite.com/elastic/beats-packaging-pipeline/builds/114

(cherry picked from commit 726f6e9)

---------

Co-authored-by: Dimitrios Liappis <dimitrios.liappis@gmail.com>

.buildkite/packaging.pipeline.yml

@@ -44,6 +44,10 @@ steps:
           provider: gcp
           image: "${IMAGE_UBUNTU_X86_64}"
           machineType: "${GCP_DEFAULT_MACHINE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         commands:
           - make build/distributions/dependencies.csv
           - make beats-dashboards
@@ -62,6 +66,10 @@ steps:
           provider: gcp
           image: "${IMAGE_UBUNTU_X86_64}"
           machineType: "${GCP_DEFAULT_MACHINE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         commands:
           - make build/distributions/dependencies.csv
           - make beats-dashboards
@@ -86,6 +94,10 @@ steps:
           provider: gcp
           image: "${IMAGE_UBUNTU_X86_64}"
           machineType: "${GCP_DEFAULT_MACHINE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         artifact_paths:
           - build/distributions/**/*
         matrix:
@@ -116,6 +128,10 @@ steps:
           provider: "aws"
           imagePrefix: "${AWS_IMAGE_UBUNTU_ARM_64}"
           instanceType: "${AWS_ARM_INSTANCE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         artifact_paths:
           - build/distributions/**/*
         matrix:
@@ -147,6 +163,10 @@ steps:
           provider: gcp
           image: "${IMAGE_UBUNTU_X86_64}"
           machineType: "${GCP_DEFAULT_MACHINE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         artifact_paths:
           - build/distributions/**/*
         matrix:
@@ -177,6 +197,10 @@ steps:
           provider: "aws"
           imagePrefix: "${AWS_IMAGE_UBUNTU_ARM_64}"
           instanceType: "${AWS_ARM_INSTANCE_TYPE}"
+        timeout_in_minutes: 40
+        retry:
+          automatic:
+            - limit: 1
         artifact_paths:
           - build/distributions/**/*
         matrix: