Accepting request 1197908 from home:aschnell:boost

- update to 1.86.0
  * process turned into compile library
  * for details on all changes see,
    https://www.boost.org/users/history/version_1_86_0.html
- boost-aarch64-flags.patch: updated
- boost-1.57.0-python-abi_letters.patch: updated
- boost-process.patch: removed (included upstream)
- boost-charconv-quadmath.patch: removed (improved upstream)

OBS-URL: https://build.opensuse.org/request/show/1197908
OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/boost?expand=0&rev=330

README.boost-devel

@@ -0,0 +1,4 @@
+boost-devel has been split up into individual packages for simpler
+product management. Please stop depending explicitly on boost-devel
+and depend on individual boost -devel packages
+