Check control file default version

[chilagrow]

Closes FerretDB/FerretDB#4725.

PR Overview

This PR refactors the version handling logic for Debian packages and Docker images so that a unified version representation is used, addressing discrepancies reported in FerretDB/FerretDB#4725.

• Introduces a new "versions" struct to consolidate Docker image and Debian version information.
• Updates functions (defineVersion, defineVersionForPR/Branch/Tag, and setSummary) to use the new struct.
• Updates tests and removes deprecated docker and Debian helper functions.

Reviewed Changes

File	Description
ferretdb_packaging/defineversion/main.go	Introduces the versions struct and updates version definition and summary functions.
ferretdb_packaging/defineversion/main_test.go	Updates tests to assert the new versions struct and expected outputs.
ferretdb_packaging/defineversion/docker_test.go	Removes legacy test code related to the old images struct.
ferretdb_packaging/defineversion/docker.go	Eliminates unused docker version functions; retains image URL helper.
ferretdb_packaging/defineversion/debian.go	Removes deprecated Debian version helper functions.

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

ferretdb_packaging/defineversion/main.go:22

• [nitpick] The struct name 'versions' may be misleading because it represents a single version record. Consider renaming it to 'Version' or 'VersionInfo' for improved clarity.

type versions struct {

[AlekSi]

There are conflicts now

[mergify]

@chilagrow this pull request has merge conflicts.

PR Overview

This PR verifies that the git tag version matches the control file’s default version. It updates the tests to use an explicit controlDefaultVersion, adds a new test case to catch mismatches, and adjusts the defineVersionForTag function to check and enforce the version match.

Reviewed Changes

File	Description
ferretdb_packaging/defineversion/main_test.go	Removes embedded constants and passes controlDefaultVersion from test cases; adds new test case.
ferretdb_packaging/defineversion/main.go	Reorders parameters in defineVersionForTag and adds an explicit version comparison check.

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.