Parse GitLab Runner release version suffixes

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR ensures that GitLab Runner versions parsed from the releases feed retain the version suffix (such as '-rc1'), after this support was added in !90904 (merged).

Part of GraphQL: Expose filter on GitLab Runner upgrade... (#358406 - closed)

Screenshots or screen recordings

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

The tests should be enough to demonstrate that the change works as expected. It is also possible to see it in the GDK console:

Gitlab::Ci::RunnerReleases.instance.releases
=> [#<Gitlab::VersionInfo:0x0000000161bb4b00 @major=14, @minor=3, @patch=2, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb4c40 @major=14, @minor=4, @patch=0, @suffix_s="-rc1">,
 #<Gitlab::VersionInfo:0x0000000161bb4d80 @major=14, @minor=4, @patch=0, @suffix=[], @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb4ec0 @major=14, @minor=5, @patch=0, @suffix_s="-rc1">,
 #<Gitlab::VersionInfo:0x0000000161bb5000 @major=14, @minor=5, @patch=0, @suffix=[], @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5140 @major=14, @minor=6, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5640 @major=14, @minor=6, @patch=1, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5280 @major=14, @minor=7, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb58c0 @major=14, @minor=7, @patch=1, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb53c0 @major=14, @minor=8, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5500 @major=14, @minor=8, @patch=1, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5780 @major=14, @minor=8, @patch=2, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb6040 @major=14, @minor=8, @patch=3, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5a00 @major=14, @minor=9, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5b40 @major=14, @minor=9, @patch=1, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5f00 @major=14, @minor=9, @patch=2, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5c80 @major=14, @minor=10, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb5dc0 @major=14, @minor=10, @patch=1, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb6180 @major=15, @minor=0, @patch=0, @suffix_s="">,
 #<Gitlab::VersionInfo:0x0000000161bb62c0 @major=15, @minor=1, @patch=0, @suffix_s="">]

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