CI: support free disk space for workflows in Ubuntu

[tuhaihe]

Similar to the free disk space actions for workflows in Rocky Linux, this commit adds the same feature to the workflows in Ubuntu.

You can see #1511 for details.

Fixes #ISSUE_Number

What does this PR do?

Type of Change

• Bug fix (non-breaking change)
• New feature (non-breaking change)
• Breaking change (fix or feature with breaking changes)
• Documentation update

Breaking Changes

Test Plan

• Unit tests added/updated
• Integration tests added/updated
• Passed make installcheck
• Passed make -C src/test installcheck-cbdb-parallel

Impact

Performance:

User-facing changes:

Dependencies:

Checklist

• Followed contribution guide
• Added/updated documentation
• Reviewed code for security implications
• Requested review from cloudberry committers

Additional Context

CI Skip Instructions

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[leborchuk]

LGTM

[tuhaihe]

It also works well in Ubuntu:

=== Disk space before cleanup ===
Filesystem      Size  Used Avail Use% Mounted on
overlay          73G   59G   14G  82% /
=== Disk space after cleanup ===
Filesystem      Size  Used Avail Use% Mounted on
overlay          73G   27G   47G  37% /