[FLINK-17223][AZP] Clean up disk space on Azure-hosted builders

tools/azure-pipelines/jobs-template.yml

@@ -35,6 +35,11 @@ jobs:
  # See also https://docs.microsoft.com/en-us/azure/devops/pipelines/process/phases?view=azure-devops&tabs=yaml#workspace 
 
  steps:
+ # if on Azure, free up disk space
+ - script: ./tools/azure-pipelines/free_disk_space.sh
+ target: host
+ condition: not(eq('${{parameters.test_pool_definition.name}}', 'Default'))
+ displayName: Free up disk space
  # The cache task is persisting the .m2 directory between builds, so that
  # we do not have to re-download all dependencies from maven central for 
  # each build. The hope is that downloading the cache is faster than
@@ -100,6 +105,11 @@ jobs:
  misc:
  module: misc
  steps:
+ # if on Azure, free up disk space
+ - script: ./tools/azure-pipelines/free_disk_space.sh
+ target: host
+ condition: not(eq('${{parameters.test_pool_definition.name}}', 'Default'))
+ displayName: Free up disk space
 
  # download artifacts
  - task: DownloadPipelineArtifact@2