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So if Russia really wanted their own chips, like their own design, their own production, and all that, and wanted said chips to be on the same level as modern chips from Intel, IBM, etc, well they'd have to spend a ton of money, and a good amount of time.
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All is as you say. But your conditional statement reveals why your argument is irrelevant.
Why do the Russian chips need "to be on the same level as modern chips from Intel, IBM, etc,"? They aren't trying to compete against those companies. They aren't selling them on the open market. They are simply using them of desktop computers and servers in the government, by government purchasing decision.
Commercial processors reached the level that they can fulfill all the real functional needs of the vast majority of desktop applications years ago. A decade old chip running decade old office software can do everything nearly everyone working in an office needs to do as well as the latest and "greatest". Microsoft, Intel, and the PC makers now work in quasi-collusion to force "upgrades" on businesses that do not need them or want them to keep the revenue flowing, but with diminishing success at doing so. Witness the fact that 28% of PCs still run Windows XP despite facing the artificial pressure of support termination by Microsoft, and not being able to buy any XP computers for years.
The advantages of using the newest chips have little or nothing to do with supporting the core office functions for which they are purchased - it is to run "eye candy", power saving (not an issue Russia cares about), or applications that actually harm typical office productivity.
The issue is a bit more complicated for servers - but most server applications only require a tiny fraction of modern chip capabilities, which is why high degrees of virtualization are now common. The Russians will have to use more server chips, but each app will still run fine.