apllied style fixes fro xpack/auditbeat pipeline (#39663) (#39685)

Fixed x-pack/auditbeat pipeline agent, step and notification naming according to general standard

.buildkite/x-pack/pipeline.xpack.auditbeat.yml

@@ -2,7 +2,8 @@
 name: "beats-xpack-auditbeat"
 
 env:
-  AWS_ARM_INSTANCE_TYPE: "t4g.xlarge"
+  AWS_ARM_INSTANCE_TYPE: "m6g.xlarge"
+  AWS_IMAGE_UBUNTU_ARM_64: "platform-ingest-beats-ubuntu-2204-aarch64"
 
   GCP_DEFAULT_MACHINE_TYPE: "c2d-highcpu-8"
   GCP_HI_PERF_MACHINE_TYPE: "c2d-highcpu-16"
@@ -11,7 +12,6 @@ env:
   IMAGE_MACOS_ARM: "generic-13-ventura-arm"
   IMAGE_MACOS_X86_64: "generic-13-ventura-x64"
   IMAGE_RHEL9_X86_64: "family/platform-ingest-beats-rhel-9"
-  IMAGE_UBUNTU_ARM_64: "platform-ingest-beats-ubuntu-2204-aarch64"
   IMAGE_UBUNTU_X86_64: "family/platform-ingest-beats-ubuntu-2204"
   IMAGE_WIN_10: "family/platform-ingest-beats-windows-10"
   IMAGE_WIN_11: "family/platform-ingest-beats-windows-11"
@@ -53,7 +53,7 @@ steps:
           - "x-pack/auditbeat/build/*.json"
         notify:
           - github_commit_status:
-              context: "x-pack/auditbeat: Ubuntu Unit (MODULE) Tests"
+              context: "x-pack/auditbeat: Build (MODULE) Tests"
 
       - label: ":rhel: x-pack/auditbeat RHEL9 Unit Tests"
         key: "mandatory-rhel9-unit-test"
@@ -229,7 +229,7 @@ steps:
           - github_commit_status:
               context: "x-pack/auditbeat: macOS arm64 Unit Tests"
 
-      - label: ":linux: x-pack/auditbeat Ubuntu ARM Unit Tests"
+      - label: ":ubuntu: x-pack/auditbeat Linux arm64 Unit Tests"
         if: build.env("BUILDKITE_PULL_REQUEST") == "false" || build.env("GITHUB_PR_LABELS") =~ /.*arm.*/
         command: |
           cd x-pack/auditbeat
@@ -239,7 +239,7 @@ steps:
             - limit: 3
         agents:
           provider: "aws"
-          imagePrefix: "${IMAGE_UBUNTU_ARM_64}"
+          imagePrefix: "${AWS_IMAGE_UBUNTU_ARM_64}"
           instanceType: "${AWS_ARM_INSTANCE_TYPE}"
         artifact_paths:
           - "x-pack/auditbeat/build/*.xml"
@@ -292,7 +292,7 @@ steps:
         timeout_in_minutes: 20
         agents:
           provider: "aws"
-          imagePrefix: "${IMAGE_UBUNTU_ARM_64}"
+          imagePrefix: "${AWS_IMAGE_UBUNTU_ARM_64}"
           instanceType: "${AWS_ARM_INSTANCE_TYPE}"
         env:
           PLATFORMS: "linux/arm64"