[WIP] Fix the version info for building from tar files

[tuhaihe]

Fow now, if we build Cloudberry from a source zip file (not using git
clone), the version information displayed is not matched the right one,
always return 1.0.0 like this:

   PostgreSQL 14.4 (Apache Cloudberry 1.0.0 build dev)

In this PR, I change the string from 1.0.0 to main to let the version
right, and create one new file VERSION for us to update the release
info easier. When users build Cloudberry from main tar files, then
will return the right info.

Please take a note that, for each release, we need to change the
VERSION file to match the version manually.

Note

this pr is based on #924

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

---

[yjhjstz]

from the code dbeaver

public class CloudberryDataSource extends GreenplumDataSource {

    private static final Log log = Log.getLog(CloudberryDataSource.class);

    private Version cbVersion;

    public CloudberryDataSource(DBRProgressMonitor monitor, DBPDataSourceContainer container) throws DBException {
        super(monitor, container);
    }

    @Override
    public void initialize(@NotNull DBRProgressMonitor monitor) throws DBException {
        super.initialize(monitor);
        // Read server version
        if (serverVersion != null) {
            Matcher matcher = Pattern.compile("Cloudberry Database ([0-9\\.]+)").matcher(serverVersion);
            if (matcher.find()) {
                cbVersion = new Version(matcher.group(1));
            }
            gpVersion = new Version(7, 0, 0);
        }

        if (cbVersion == null) {
            cbVersion = new Version(1, 0, 0);
        }
    }
}

Cloudberry Database need a version, but not main .

[tuhaihe]

Cloudberry Database need a version, but not main .

Agreed. For PG, I found they always use the next release version + devel, like 18devel. It's hard for us to define the next major version, right? One simple way is to set the main branch release as 99.0.0 or 999.0.0?

https://github.com/postgres/postgres/blob/7da344b9f84f0c63590a34136f3fa5d0ab128657/configure.ac#L20