Merge dashpay#6023: backport: bitcoin#21740, bitcoin#21873, bitcoin#24762, bitcoin#25015 - new linter for filenames and permissions

e0ad143 chore: dashify file list exception for liner (Konstantin Akimov)
98a2dad fix: wrong permission for various files accordingly new linter (Konstantin Akimov)
c8c58a1 Merge bitcoin#25015: test: Use permissions from git in lint-files.py (MacroFake)
f226e8d Merge bitcoin#24762: lint: Start to use py lint scripts (MarcoFalke)
85013e9 Merge bitcoin#21873: test: minor fixes & improvements for files linter test (MarcoFalke)
dce79f5 Merge bitcoin#21740: test: add new python linter to check file names and permissions (W. J. van der Laan)

Pull request description:

  ## Issue being fixed or feature implemented
  Backports from bitcoin v22+ for a new linter for filenames and file permissions

  ## What was done?
  backports:
   - bitcoin#21740
   - bitcoin#21873
   - bitcoin#24762
   - bitcoin#25015

  ## How Has This Been Tested?
  Run new linter: `test/lint/lint-files.py`

  ## Breaking Changes
  N/A

  ## Checklist:
  - [x] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone

ACKs for top commit:
  PastaPastaPasta:
    utACK e0ad143

Tree-SHA512: e0ccc1655628fb34a40875b8da28145d44c94868efd9934457568afbe9b75db3954fef80870119476d7bdc9c3424a9b222ede6e47333ea432e1ef63f2218e938

Author: PastaPastaPasta