Fix display of previous gem version when previously downloaded already

[zarqman]

What was the end-user or developer problem that led to this PR?

bundle update is no longer showing the green (was: x.y.z) suffix for updated gems that were already installed (eg: by another app).

This displayed in bundler <= 2.3.13 and went missing in 2.3.14.

What is your fix for the problem, implemented in this PR?

This PR reenables the "was..." suffix, which matches what was displayed both in bundler <= 2.3.13 and as still displayed in the current version for newly downloaded gems and for sources other than Rubygems.

In <= 2.3.13 and again with this PR:

Using rails 7.0.4 (was 7.0.3)

In 2.3.14+:

Using rails 7.0.4

Background

A number of changes surrounding tracking of the previous gem version were made in #5530, which was part of bundler 2.3.14. It appears those changes simply missed passing the previous spec info to the newly enhanced version_message method in the described case.

Make sure the following tasks are checked

• Describe the problem / feature
• Write tests for features and bug fixes
• Write code to solve the problem
• Make sure you follow the current code style and write meaningful commit messages without tags

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[deivid-rodriguez]

Nice catch @zarqman, thanks for fixing this!

I added a regression spec to make sure I don't introduce the same mistake again in the future.