1bc92be Depends: Bump rust toolchain to v1.69.0 (Fuzzbawls)
5708543 Scripts: Bump minimum supported glibc to v2.27 (Fuzzbawls)
f2cfadb GA: Run security-check on depends based builds (Fuzzbawls)
0a27b16 GA: Run symbol-check on depends based builds (Fuzzbawls)
02b7cb9 scripts: add PE dylib checking to symbol-check.py (fanquake)
ee3bdc6 depends: build gmp with PIC on all platforms (Fuzzbawls)
85d1632 scripts: add MACHO dylib checking to symbol-check.py (fanquake)
c2facf0 scripts: fix check-symbols & check-security argument passing (fanquake)
3af2b2f scripts: add MACHO NOUNDEFS check to security-check.py (fanquake)
83f86c3 scripts: add MACHO PIE check to security-check.py (fanquake)

Pull request description:

  Alternative to #2871.

  This bumps our Rust Toolchain to v1.69.0, but comes at the cost of ALSO bumping our minimum supported linux glibc to 2.27, which officially drops support for Ubuntu 16.04, Debian 8 (Jessie), Debian 9 (Stretch), and CentOS 7 for binary releases.

  Ubuntu 16.04 and CentOS 7 technically don't reach EOL (End Of Life) until 2024, but both are largely unsupported in linux communities already.

  The major benefit to this outside of being able to use a more recent Rust toolchain version, is that it allows us to use the official Rust distribution toolchains and no longer maintain our own modified versions, a significant time saver if this ability is carried forward in the future.

ACKs for top commit:
  Duddino:
    tACK 1bc92be, works fine with #2870
  panleone:
    tACK 1bc92be

Tree-SHA512: b59cf43045c189d6d68ca9770ef17f59baa4d5d4c854a9fb94afa8ac59a2fe576216926416689e6ad39161fccea51791552558da95d22850ba8b9af4c7abe015