fix(printer): handle multiline permanent progress correctly

[gcomneno]

Summary

Handle multiline permanent progress updates correctly when replacing a previous temporary progress message.

Previously, a permanent multiline progress message could leave leftover text from the previous temporary progress line on the terminal, and multiline progress text was also logged as a single string containing embedded newlines.

This change formats terminal multiline progress output line-by-line so each rendered line is fully cleared, and logs multiline message text as separate timestamped lines.

Testing

pytest -q tests/integration/test_messages_integration.py -k "multiline_permanent_progress_overwrites_temporary_progress" -rs -vv
pytest -q tests/unit/test_printer.py -k "_log or writelineterminal" -rs
ruff check craft_cli/printer.py tests/integration/test_messages_integration.py tests/unit/test_printer.py

[gcomneno]

The functional test matrix is passing. The remaining failures appear unrelated to this change:

• OSV-scanner reports GHSA-6w46-j5rx-g56g for pytest 9.0.2 in generated requirements, while the source scan reports no issues.
• lint / files fails only in ty diagnostics outside this PR's diff. This PR changes only craft_cli/printer.py and tests/integration/test_messages_integration.py; ruff, mypy, pyright, formatting, and the test jobs are passing.