[flake8-pyi] Make example error out-of-the-box (PYI014, PYI015)

[MeGaGiGaGon]

Summary

Part of #18972

Both in one PR since they are in the same file

No playground links since the playground does not support rules that only apply to PYI files

PYI014

This PR makes argument-default-in-stub (PYI014)'s example error out-of-the-box

Old example:

PS ~\Desktop\New_folder\ruff>echo @"

def foo(arg=[]) -> None: ...

"@ | uvx ruff check --isolated --preview --select PYI014 --stdin-filename "test.pyi" -

All checks passed!

New example:

PS ~\Desktop\New_folder\ruff>echo @"

def foo(arg=bar()) -> None: ...

"@ | uvx ruff check --isolated --preview --select PYI014 --stdin-filename "test.pyi" -

test.pyi:1:13: PYI014 [*] Only simple default values allowed for arguments
  |
1 | def foo(arg=bar()) -> None: ...
  |             ^^^^^ PYI014
  |
  = help: Replace default value with `...`

Found 1 error.
[*] 1 fixable with the `--fix` option.

PYI015

This PR makes assignment-default-in-stub (PYI015)'s example error out-of-the-box

Old example:

PS ~\Desktop\New_folder\ruff>echo @"

foo: str = "..."

"@ | uvx ruff check --isolated --preview --select PYI015 --stdin-filename "test.pyi" -

All checks passed!

New example:

PS ~\Desktop\New_folder\ruff>echo @"

foo: str = bar()

"@ | uvx ruff check --isolated --preview --select PYI015 --stdin-filename "test.pyi" -

test.pyi:1:12: PYI015 [*] Only simple default values allowed for assignments
  |
1 | foo: str = bar()
  |            ^^^^^ PYI015
  |
  = help: Replace default value with `...`

Found 1 error.
[*] 1 fixable with the `--fix` option.

Test Plan

N/A, no functionality/tests affected

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.