Replace pip3 download with curl for Python deps

[tuhaihe]

Replace pip3 download commands with curl for downloading psutil,
PyYAML and PyGreSQL packages in gpMgmt/bin/Makefile.

This change unifies the download mechanism to use curl consistently
for all Python dependencies, avoiding potential pip3 download
compatibility issues across different environments.

Changes:

• Remove pip3 download commands for psutil, PyYAML and PyGreSQL
• Use curl to download packages directly from PyPI
• Maintain existing wheel and cython installation for PyYAML build
• Keep the same package versions and download locations

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

---

[tuhaihe]

We will have a failure during the build process if enabling the configure option --with-pythonsrc-ext without pre-installing the python3-pip package in Ubuntu. python3-pip will be installed as a dependency by Python in Rocky Linux, but will not be installed in Ubuntu Docker Image.

The following is how to fix it:

• Pre-install python3-pip as a required dependency;
• Check if the python3-pip is installed; if not, will install this package to resolve the failure.

[tuhaihe]

Updates: will add the curl, pip3 check in the configure.ac.

Why?

• curl and pip3 are not default-installed in the Ubuntu 20.04/22.04 Docker image. So for a better user experience, we need to check these dependencies before make install the Cloudberry. When users run the configure with the option --with-pythonsrc-ext, it will check the dependencies earlier.

Why use curl instead of pip3 download?

• pip3 download has some compatibility issues between different Python versions (3.6 under Rocky8, 3.9 under Rocky9), especially for downloading pyyaml - pyaml 5.7 is a little old and has different behavior across Ubuntu and Rockylinux. So for a simple way, change the way of downloading these Python packages.

[tuhaihe]

Already tested successfully on Ubuntu 20.04/22.04 + Rocky Linux 8/9.

[tuhaihe]

Note

This commit will also be cherry-picked into the branch REL_2_STABLE.

[jiaqizho]

LGTM

[xtangcode]

Configure updates to support deps.