Link OpenSSL dynamically (#10302)

## Problem
Statically linked OpenSSL is buggy in multithreaded environment:
- https://github.com/neondatabase/cloud/issues/16155
- https://github.com/neondatabase/neon/issues/8275

## Summary of changes
- Link OpenSSL dynamically (revert OpenSSL part from
https://github.com/neondatabase/neon/pull/8074)

Before:
```
ldd /usr/local/v17/lib/libpq.so
        linux-vdso.so.1 (0x0000ffffb5ce4000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000ffffb5c10000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffffb5650000)
        /lib/ld-linux-aarch64.so.1 (0x0000ffffb5ca7000)
```

After:
```
ldd /usr/local/v17/lib/libpq.so
        linux-vdso.so.1 (0x0000ffffbf3e8000)
        libssl.so.3 => /lib/aarch64-linux-gnu/libssl.so.3 (0x0000ffffbf260000)
        libcrypto.so.3 => /lib/aarch64-linux-gnu/libcrypto.so.3 (0x0000ffffbec00000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000ffffbf1c0000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffffbea50000)
        /lib/ld-linux-aarch64.so.1 (0x0000ffffbf3ab000)
```

Dockerfile

@@ -71,6 +71,7 @@ RUN set -e \
         ca-certificates \
 	# System postgres for use with client libraries (e.g. in storage controller)
         postgresql-15 \
+        openssl \
     && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
     && useradd -d /data neon \
     && chown -R neon:neon /data