fix: keep data as default gnohome keybase db

[gfanton]

following #1944

The $GNOHOME/data directory has been moved to the $GNOHOME/db directory, which can lead to confusion as no proper migration has been set up. This PR reverts the data folder back to its original location for GNOHOME.

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[zivkovicmilos]

@gfanton please check mod tidy for some reason

[zivkovicmilos]

Confirmed works ✅

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 46.25%. Comparing base (ee9e2e2) to head (aa161c2).

Files	Patch %	Lines
tm2/pkg/crypto/keys/utils.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1984      +/-   ##
==========================================
- Coverage   48.28%   46.25%   -2.03%     
==========================================
  Files         409      483      +74     
  Lines       62225    68837    +6612     
==========================================
+ Hits        30045    31842    +1797     
- Misses      29669    34368    +4699     
- Partials     2511     2627     +116     

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