Increase default PCLUSTER_RESERVED_VOLUME_SIZE to 32 #2881

Job	Run time
AWS Batch CLI Tests (ubuntu-latest, Python 3.7 AWS Batch CLI Tests)	27s
CLI Tests (ubuntu-latest, Python 3.7 Tests)	3m 44s
CLI Tests (ubuntu-latest, Python 3.8 Tests)	3m 46s
AWS Batch CLI Tests (ubuntu-latest, Python 3.8 AWS Batch CLI Tests)	27s
CLI Tests (ubuntu-latest, Python 3.9 Tests)	3m 29s
AWS Batch CLI Tests (ubuntu-latest, Python 3.9 AWS Batch CLI Tests)	30s
CLI Tests (ubuntu-latest, Python 3.10 Tests)	3m 29s
AWS Batch CLI Tests (ubuntu-latest, Python 3.10 AWS Batch CLI Tests)	30s
AWS Batch CLI Tests (ubuntu-latest, Python 3.11 AWS Batch CLI Tests)	26s
CLI Tests (ubuntu-latest, Python 3.11 Tests)	2m 54s
AWS Batch CLI Tests (ubuntu-latest, Python 3.12 AWS Batch CLI Tests)	31s
CLI Tests (ubuntu-latest, Python 3.12 Tests)	3m 8s
CLI Tests (ubuntu-latest, Python 3.10 Tests Coverage)	5m 31s
AWS Batch CLI Tests (ubuntu-latest, Python 3.10 AWS Batch CLI Tests Coverage)	29s
CLI Tests (ubuntu-latest, Code Checks)	1m 31s
AWS Batch CLI Tests (ubuntu-latest, Code Checks AWS Batch CLI)	50s
CLI Tests (ubuntu-latest, CLI CloudFormation Templates Checks)	46s
Dependency Check	26s
CLI Tests (ubuntu-latest, API CloudFormation Templates Checks)	28s
Shellcheck	4s
CLI Tests (ubuntu-latest, Integration Tests Config Checks)	29s
API Model Validation	1m 29s
External SlurmDBD Template Validation	35s
	35m 59s

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