fix: In dbKeybase.writeInfo, if replacing a name entry, remove the lookup by the old address

[jefft0]

This PR fixes the bug demonstrated in #2684 :

• In dbKeybase.writeInfo, add an error return and propagate this to all callers (writeLocalKey, etc.) . We need writeInfo to do some database integrity checks, so it needs to be able to return an error.
• Update dbKeybase.writeInfo as suggested in #2684 . If an existing name entry is being replaced with new Info, then remove the "lookup by address" entry for the existing address.
• In TestKeyManagement, add a test similar to #2684 , except that after using CreateAccount with the same name, expect GetByAddress to fail for the obsolete address and its (non-existing) public key. (This test passes.)

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

[codecov]

Codecov Report

Attention: Patch coverage is 53.33333% with 14 lines in your changes missing coverage. Please review.

Project coverage is 60.21%. Comparing base (651f5aa) to head (72a4b46).
Report is 96 commits behind head on master.

Files with missing lines	Patch %	Lines
tm2/pkg/crypto/keys/keybase.go	53.33%	10 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2685      +/-   ##
==========================================
- Coverage   60.22%   60.21%   -0.01%     
==========================================
  Files         562      562              
  Lines       75038    75048      +10     
==========================================
- Hits        45188    45187       -1     
- Misses      26476    26482       +6     
- Partials     3374     3379       +5     

Flag	Coverage Δ
contribs/gnodev	61.40% <ø> (ø)
contribs/gnofaucet	15.31% <ø> (ø)
gno.land	64.57% <ø> (ø)
gnovm	64.33% <ø> (ø)
misc/genstd	80.54% <ø> (ø)
misc/logos	19.88% <ø> (ø)
tm2	62.04% <53.33%> (+0.06%)	⬆️

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[notJoon]

The major changes made in the writeMultisigKey and writeInfo functions are well covered in the tests. I think this PR can move on to the next step 👍

remove review/triage-pending flag