Reduce version cloning

[skrynski]

It tries to avoid the cloning of versions and applies modifications in-place. Added some flags to track references to versions and catch simple cases

[skrynski]

Be careful with lastSeen variable, that might get GCed and reused. It might be better to use incremental ids

[o-]

Here are some stats for your PR:

• WARNING: the longest CI job test_features_3 took 3.89h
• are-we-fast-r suite regressed by 0.96
• simple suite improved by 1.03
• Bounce_nonames regressed by 0.85
• mandelbrot_naive_ascii regressed by 0.9
• fasta regressed by 0.94
• Overall benchmarks improved by 1.0

Please find your performance results at https://rir-benchmarks.prl.fit.cvut.cz/diff?job_ids[]=2443680603&job_ids[]=2427588749&selection=all

[o-]

Here are some stats for your PR:

• WARNING: the longest CI job test_features_1 took 2.66h
• Overall benchmarks improved by 1.01

Please find your performance results at https://rir-benchmarks.prl.fit.cvut.cz/diff?job_ids[]=2468496070&job_ids[]=2467128976&selection=all