fix get_raw_path with double slash prefix path for legacy v-host S3

[bentsku]

Motivation

As raised by #9723, when supplying a path only starting with double slashes, get_raw_path does not parse it properly, it returns an empty .path property.
If RAW_URI contains only a path, get_raw_path does need to call urlparse, we can manually strip the query string and return the path from it.

Changes

• manually return the path from RAW_URI if it starts with a double slashes
• add S3 tests in virtual host mode which validates the fix for the legacy provider (calling get_raw_path when rewriting the URL)
• add a unit test

[github-actions]

LocalStack Community integration with Pro

       2 files         2 suites   1h 8m 1s ⏱️
2 358 tests 2 043 ✔️ 315 💤 0 ❌
2 359 runs  2 043 ✔️ 316 💤 0 ❌

Results for commit 19bbd5c.

♻️ This comment has been updated with latest results.

[coveralls]

coverage: 84.002% (-0.04%) from 84.04%
when pulling 19bbd5c on fix-double-slash-prefix-path
into 1399fda on master.

[alexrashed]

Clean fix, with great tests 👍🏽 💯