remove libgit2-dev from build-time deps

this is being removed because while building I'm running into following
issue.

  libgit2-1.8.0-r1.apk disqualified because libgit2-1.9.0-r0.apk already
provides cmd:git2

looks like we already pull into libgit2 at build-time.

Signed-off-by: kranurag7 <81210977+kranurag7@users.noreply.github.com>

qdrant.yaml

@@ -17,7 +17,6 @@ environment:
       - clang-16-dev
       - curl
       - jq
-      - libgit2-dev
       - llvm-cmake-16
       - llvm-lld-16-dev
       - openssf-compiler-options