[SRU] Uplift to upstream v3.36.3.1 microrelease

[fossfreedom]

Upstream have released v3.36.3.1 which includes a CVE security fix together with bug-fixes for this v3.36 series

Proposed changelog
    - Fixed handling of pinned, invalid TLS certificates: CVE-2020-24661
    - Build bug fixes
    - Client library now installed to private lib sub-directory
    - Allow downstream packagers set their package's version number
    - Numerous bug fixes and user interface improvements
  * drop existing patches except for Bump-client-test-timeout-to-300s.patch
    which has been refreshed to remove fuzz.
  * Bump-client-test-timeout-to-300s.patch - add same timeout for engine
    tests to allow slower architecture builds to complete
  * d/control.in - update maintainer to Ubuntu Developers
  * d/control.in - remove Debian specific build dependency firmware-linux-free
  * Update build rules based on v3.38 bullseye package
    - d/rules drop --as-needed from linker flags (no longer needed in bullseye)
    - d/rules strip Ubuntu -Bsymbolic-functions, the tests are failing otherwise
  * d/rules add CHECK_HOME statements for test build to resolve test failures
    due to dconf permission denied noise

Test build: https://launchpad.net/~ubuntubudgie-dev/+archive/ubuntu/geary-test/+packages

TBD - add SRU template

Currently the build fails on armhf and arm64 - possibly this issue? https://gitlab.gnome.org/GNOME/geary/-/issues/829

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: geary 3.36.1-1
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu27.12
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Budgie:GNOME
Date: Sat Nov 14 13:05:34 2020
InstallationDate: Installed on 2016-11-26 (1448 days ago)
InstallationMedia: budgie-remix 16.10 "Budgie-remix" - amd64 (20161013)
SourcePackage: geary
UpgradeStatus: Upgraded to focal on 2020-06-29 (137 days ago)