fix: remove special char from snapshot symbols

[mih-kopylov]

The Pull Request is a backport of a commit that renames the snapshot files that are not supported by Windows

See the discussion in #3204

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
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[mih-kopylov]

@aeneasr it looks like some linting rules are not met in master branch, but that is not introduced with this PR
https://github.com/ory/hydra/runs/8014301049?check_suite_focus=true#step:11:30

Can we merge this PR please, so that master branch has fixes for Windows?

[codecov]

Codecov Report

Merging #3229 (3bb943a) into master (2d080a0) will decrease coverage by 0.06%.
The diff coverage is 61.90%.

❗ Current head 3bb943a differs from pull request most recent head 1853a3b. Consider uploading reports for the commit 1853a3b to get more accurate results

@@            Coverage Diff             @@
##           master    #3229      +/-   ##
==========================================
- Coverage   79.32%   79.25%   -0.07%     
==========================================
  Files         111      111              
  Lines        8084     8105      +21     
==========================================
+ Hits         6413     6424      +11     
- Misses       1258     1263       +5     
- Partials      413      418       +5     

Impacted Files	Coverage Δ
oauth2/session.go	80.00% <61.90%> (-9.75%)	⬇️
persistence/sql/persister_oauth2.go	79.09% <0.00%> (-0.82%)	⬇️

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[vinckr]

Hello @mih-kopylov
Congrats on merging your first PR in Ory 🎉 !
Your contribution will soon be helping secure millions of identities around the globe 🌏.
As a small token of appreciation we send all our first time contributors a gift package to welcome them to the community.
Please drop me an email and I will forward you the form to claim your Ory swag!