…tiple leading slashes (#4844)

This PR addresses an issue where relative paths with leading slashes and
dots were not being stripped correctly. The problem arises when the
'path' contains multiple leading slashes like `../../`, as the current
logic strips it to `/../`, which is incorrect and prevents the entity
from being discovered.

This code modification ensures that any dots followed by slashes are
stripped to provide the full path without any dots and slashes at the
beginning.

**Please note:** that the current behavior is such that if you pass
`./my/path` the result is `/my/path` However, with the updated code, the
result will be `my/path` This change is made because, in the end, we use
the resulting path to check if the `source` contains the path using
`endsWith`, and the leading slash is unnecessary for this purpose.

## Update
I added a slash again after @B4nan clarified a case that we need it in
this
[thread](https://mikroorm.slack.com/archives/CFTFEK39D/p1697634946389959?thread_ts=1697550457.817269&cid=CFTFEK39D)

so the result now for `./my/path` will be `/my/path`