cmd/erase: make erase confirmation optional at compile-time

[nalajcie]

erase command confirmation will be disabled by default at a compile time.

Description

NOTE: some changes in trunner might be needed, but plo erase command is not being used in testing right now (jffs2 -e might be - and it doesn't require human confirmation ;)).

Motivation and Context

JIRA: NIL-550

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: NIL

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

7 700 tests  ±0   6 985 ✅ ±0   39m 0s ⏱️ + 1m 16s
  436 suites ±0     715 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit b0b3b2a. ± Comparison against base commit 9787100.