Restore system OpenSSL linkage for Linux releases and generate .deb deps

[NateIsern]

Motivation

• Prevent release artifacts from statically embedding the repository depends OpenSSL 1.0.1k so shipped binaries keep distro-managed libssl updates and security fixes.
• Ensure Debian packages declare correct shared-lib runtime dependencies instead of hardcoding libc6 only.

Description

• Reverted Linux and Debian release jobs to use Ubuntu system development packages by installing libssl-dev, libboost-all-dev, libdb5.3-dev, libminiupnpc-dev, libzmq3-dev, and libevent-dev in the workflow Install dependencies steps in .github/workflows/release.yml.
• Removed the make -C depends HOST=... / CONFIG_SITE=$PWD/depends/.../config.site based configure step and restored ./configure against the system libraries for the Linux tarball and Debian build jobs.
• Replaced the hardcoded Debian control Depends: libc6 with an invocation of dpkg-shlibdeps to compute DEPENDS dynamically and write Depends: ${DEPENDS} in the generated control file so libssl and other shared libs are visible to the package manager.

Testing

• Ran git diff --check to validate no whitespace/patch errors, which succeeded.
• Ran a Python static regression check that asserts the workflow no longer calls make -C depends and does not set CONFIG_SITE=$PWD/depends/.../config.site, which passed.
• Ran a Python static regression check that asserts the Debian control no longer contains the literal Depends: libc6, which passed.

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Codex Task