Revert "common/version: strip trailing newline from vendor release file"

Revert "common/version: strip trailing newline from vendor release file"
Revert "src/common/version: append vendor release to ceph version(s) output"

This reverts commits 5022557a0f23e131731224b11b466a79eb1042c0 and
541439b290001e1bb15dc9b2b40671671c2b85c4.

As discussed in https://github.com/ceph/ceph/pull/67693, using a
file-based approach to get the vendor version is not safe or correct.
We are reverting this and will instead work on an approach where the
version string is baked into the binary at build time.

Fixes: https://tracker.ceph.com/issues/76134
Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com>