ledger-tool does *not* fastboot by default

[brooksprumo]

Problem

Fastboot is great for the validator, but can expose some sharp edges for ledger-tool. If a validator is already running, then calling ledger-tool will fail (on the subcommand that use accounts) due to the default fastboot value (since it tries to get primary access to the ledger). The error message does not make it obvious what the problem is, nor how to fix it.

Summary of Changes

Do not fastboot by default for ledger-tool.

This is safe, and retains the expectation that ledger-tool should not modify anything by default. Users can still opt into fastboot with ledger-tool.

[steviez]

Thanks for the fix @brooksprumo & thanks @seanyoung for uncovering / bisecting to pinpoint the problem!

[seanyoung]

Looks great, thanks for fixing quickly

[codecov]

Codecov Report

Merging #34228 (7cfc863) into master (c6451e9) will increase coverage by 0.0%.
Report is 4 commits behind head on master.
The diff coverage is 0.0%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #34228   +/-   ##
=======================================
  Coverage    81.9%    81.9%           
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  Files         819      819           
  Lines      219338   219341    +3     
=======================================
+ Hits       179695   179743   +48     
+ Misses      39643    39598   -45